It may be that lately you are wondering what the types of marine animals are, and the answer to that question is very complex, because it is not only fish, on the contrary, there are not only fish, but there are also birds, mammals, crustaceans. and much more, so we invite you to continue reading this post.
marine animals
Marine animals have been called all the animals that have their habitat in salt water, that is, in the waters of the seas or oceans, where they spend their entire life or, at least, a large portion. Of the same. In this article, in a row, we are going to show you some information about the animals that live in that environment, as well as what they are, what are the types of marine animals and what are their main characteristics.
Unfortunately, we tell you that there are multiple marine species that have become totally extinct, so these are some types of marine animals that you will not be able to meet except by photographs or filming that are preserved, as well as some specimens, in particular their skeletons, which are stored in museums and laboratories, in any case, we will mention some of them and their particularities in later sections of this article.
What are Marine Animals?
Marine animals are all species of animals that have their habitat or spend most of their time in the water. Taking into consideration that the water of the oceans constitutes 71% of the crust of our planet, it is obvious to say that the number of species of marine animals that exist is immense, but it is also the animal species that have been most affected in relation to the threat of extinction, due to activities related to fishing and the impact that man has produced in his environment.
Types of Marine Animals
The large number of species of marine animals can be classified into two large groups:
- Marine animals that do not fully need water:
These are animal species that need the mainland for their reproduction, because they have their young, either on the shore or on the coast, but they also obtain their food from other marine animals, such as small fish. , and they always manage to develop near water, in which they also have the ability to swim and can also remain submerged for long periods of time. This is the assumption of families of animals such as seals, penguins and sea lions.
- Marine animals that do totally need water
These are those families of animals that are born, grow, reproduce and die in the water, because it is their natural habitat. It is so that outside of it they cannot continue with their lives. Several examples of these families of animals are squid, octopus, fish, whales, sharks and many others.
Of course, we have to mention that the types of marine animals are not only fish. Actually, within the types of marine animals we must also include many kinds of birds, such as seagulls, mammals such as dolphins and whales, and even reptiles such as sea turtles or sea snakes.
List of the main types of Marine Animals
From now on in this article, we want to show you the main types of marine animals, but we warn you that there are many more, but the ones we are going to talk about are very different, they have different colors and sizes that are very dissimilar.
Clams
Clams are bivalve-type molluscs, which are protected by shells of symmetrical size, which have their habitat in salty waters and have the ability to withstand temperatures between 5 and 35 degrees.
Whales
It is possible to find them in all the seas and oceans of the planet. These are animals that belong to the cetacean family, which contains a large number of mammalian animals that inhabit the waters. What should be highlighted as an essential particularity is its enormous size. Another characteristic is that it has been shown that they manage to communicate with each other by means of sounds, just as dolphins do too.
bearded whale
In the previous paragraph we have talked about whales, but what we have not mentioned is that whales can be classified into two classes, baleen and toothed. Baleen whales are the vast majority of commonly seen whales. These baleen are structures that function as a kind of strainer and are located in the jaws of the whales, with which they can filter their food from the water.
In the case of the other type of whales, which are the toothed ones, we must tell you that they are carnivorous animals, and that is the reason why they have teeth, they also have the ability to hunt their prey, using different techniques.
Seahorse
It is an animal that draws a lot of attention due to its particular and characteristic appearance, which has really made it a beauty of the seas, but its structure and its customs are very peculiar. In fact, what is most peculiar about them is their reproduction and breeding behavior, because seahorses have a special way of breeding in which it is the male who incubates the eggs. It has the shape of a horse, with a snout that is very prominent. There are up to 40 kinds of seahorses.
Squid
They are carnivorous cephalopod molluscs. Yes, all those names are theirs and it is very complex to be able to classify them, because there are approximately 300 species and 29 families of squid. They are quite similar to octopuses, because they have two tentacles with suckers, and they stand out for having eight arms.
crabs
Crabs are types of marine animals that are crustaceans and have five pairs of legs, but we have to warn you that there are more than four thousand species. Although we can tell you that they belong to the family of arthropods, they have an exoskeleton with which they protect themselves from the outside world. They can be found on beaches and rivers, although their normal habitat is on sea coasts.
Sea Conches
If we refer to snails, it is likely that what comes to mind are animals that move very slowly, however these endearing animals have many peculiarities that will attract our attention. We have as an example of this that we can find snails that hibernate during the winter and that the layer of slime that covers their body is what prevents them from drying out.
In the event of a serious drought problem, they also have the ability to hibernate during the summer, with the aim of trying to survive adverse weather conditions. There are snails that live up to 5 years, while others that are in the wild have been able to live up to 25 years.
Corales
At first they give the image that they are plants, but in reality this is not the case, because they are aquatic animals. In addition, they have colors and shapes that are very attractive and live in colonies in which beautiful reefs are formed. Around 2500 species of marine corals can be found. One peculiarity is that they do not have a backbone and they are very simple animals. Its habitat is in tropical and subtropical areas, although it is possible that some species can be found that live in arctic seas.
Dolphins
This curious mammal is known to all, and automatically causes us sympathy and admiration, in addition to the cases of dolphins that have helped many human beings in a time of difficulty. They are known for being very friendly animals that play a lot with each other and with their trainers, in addition to communicating with each other and it has been shown that they are among the most intelligent animals that exist.
These are types of marine animals that need to come to the surface to breathe, because they have pulmonary respiration and are capable of swimming and traveling long distances, although they cannot dive for more than 15 minutes. They move as if they were a radar when locating their food and calculating the distances for swimming thanks to their echolocation system. These are animals that are very social.
Sea stars
Their habitat is found in the seas and oceans and they are at risk of extinction, due to the heavy pollution to which we are subjecting them. These are some types of marine animals that are invertebrates, they have five arms that end in a point, which is what gives it that beautiful star shape. They belong to the echinoderm family and do not have a brain, although they do have a very complex nervous system. These are animals that are extremely sensitive to light and temperature changes, which is why they only live in salt water.
Phocas
These are animals that make up the family of marine pinnipeds, or mammals that adapted to aquatic life. There are 19 species of seals that inhabit coastal waters that are spread throughout the world, except in tropical areas. Because of the fat under their skin, they are able to withstand low temperatures. Their food is basically made up of crustaceans, fish, cephalopods and even penguins and other seals that they themselves hunt. Their whiskers are the tools they use to detect vibrations and find their prey.
Shrimps
They normally live on the seabed of the oceans and are crustaceans that are part of the Decapoda order. There are many different species of shrimp. They are invertebrates that have an exoskeleton and feed essentially on algae, plankton and other fish.
Gaviotas
They are birds that are well known in America and Europe, they can weigh between 120 grams and 1,75 kilos, depending on the species to which they belong. They are able to move through the water quite skillfully and are highly intelligent and social. Their diet is made up of insects, fish, squid, crabs and vegetables.
manatees
They are mammalian animals that stand out for their enormous size, however, their food is vegetables, essentially plants. These are animals that are very slow. They are also very lazy and have a life expectancy of up to sixty years. They have a pulmonary breathing system and live mainly in waters that are very warm.
Jellyfish
It is thought that they are one of the oldest animals that exist, because jellyfish fossils have been found that are more than 700 million years old. There are still more than two thousand species and some species can live on the surface, while other species need the depths of the ocean to survive. They do not have a brain, but they do have a highly developed nervous system that serves as a receptor.
mussels
Its habitat is in the depths of the seas and on the coast. They are part of the Pulmonata order and there are many different species. They have gill filaments which facilitate nutrition by means of plankton. These are gregarious animals that live many together and have a life expectancy of about 70 years.
Brunettes
What is said about moray eels is that they have a bad character, because it is a totally aggressive fish. They come to have a length that is very large, it is an eel that does not have pectoral and ventral fins, they also do not have scales. Its habitat is found, in particular, in rocky areas and coral reefs in tropical and subtropical seas.
Orcas
These are animals that belong to the cetaceans of the Delphinida family, that is, they are basically dolphins, in particular it is the largest species of dolphin. They are also known by the name of killer whales and they are carnivorous animals, since their food is made up of other mammalian animals. They have the habit of living in groups, so they are gregarious, and these groups can be made up of between 6 and 60 individuals. They have a pulmonary respiratory system, so they need to breathe out of the water and have a gestation period of about 17 months.
Guppy fish
It is one of the most popular tropical freshwater fish in aquariums around the world. These are fish that are a true beauty, which can be obtained in very attractive and very different colors that, in addition, are one of the easiest fish to reproduce in captivity. There are up to 300 different types of guppies.
penguins
They are birds that do not fly, whose food is made up of other aquatic species that can be found in the oceans such as fish, squid or shrimp, among others. There is a very large species of penguin that is the emperor penguin and that can measure more than a meter, reaching up to 35 kilos in weight. Although they normally live in cold climates, it is also possible to find groups that live in the north of the Galapagos Islands.
octopuses
One of the main characteristics of these types of marine animals is that they have eight arms that are covered by twelve suckers. There are about 300 different species of octopus and it is an animal that is very intelligent. In case they feel threatened by a predator, they are capable of launching ink as a defense. They have a life expectancy of 2 years in the wild and up to 5 years in captivity.
sea serpents
They are known as Hydrophiinae and poisonous snakes. They are able to live in and out of the water. They have very bright colors and live between the Indian and Pacific Oceans. They have scales and swim thanks to the tail that acts as a propeller.
Tiburones - Sharks
It is a fish that breathes with gills and manages to move with its fins, but this is not all, but sharks stay afloat thanks to their prominent and fatty liver. They are cartilaginous animals that do not have a skeletal system and grow throughout their lives.
Sea turtles
They are cold-water reptiles that can be found in the tropical oceans and that need the mainland to lay their eggs.
Other types of Marine Animals
In this section of the article we want to show you in greater detail what kind of marine animals exist, so that you can observe and learn a little more about them, from the point of view of the classification between vertebrates or invertebrates.
invertebrates
- Echinoderms: it is a type of marine animal among which are sea urchins or stars. They are a group that normally have a section that is very spiny inside, hence their name in Greek means spiny skin. There are about 7 thousand of these species in the sea.
- Sponges: they are primitive animals that have a cover of small holes and pores through which they manage to inhale, through which the water manages to enter and exit through a large hole that receives the name of osculum. Sponges do not have tissues or body symmetry. There are about nine thousand species of the seas.
- Marine worms: they are part of the family of the equiuros, the nemertinos and the flatworms. They have the peculiarity that they are not related to each other and that their body is very soft and totally elongated.
- Rotifers: Rotifers are essentially saltwater dwelling animals. Most of them have a ventral area that is surrounded by ciliated bands and that create a kind of current that they use to catch the food that is in their environment. Some rotifers sometimes live inside tubes or capsules, so they are also sessile.
- Crustaceans: Crustaceans are part of the arthropod family and have a shell that is chitinous and calcareous and is found on the outside. They are known because they are part of the invertebrate family.
- Molluscs: They have a soft body, they are usually protected with a shell. Among the best known we can find bivalves such as clams or oysters, gastropods such as snails and slugs or cephalopods such as octopuses, cuttlefish or squid.
Vertebrates
- Fish: this is a very broad group of types of marine animals. They have a body made up of a gill apparatus and fins. They usually have very scaly skin. They have a backbone, so they are part of the vertebrate animals that can be found in the sea.
- Reptiles: they are also part of the vertebrate animals, they have very scaly skin and are generally characterized because they can crawl, which makes them stand out from the rest of the animals. In addition, they are capable of coming to the surface, sea turtles, snakes or crocodiles are some reptiles that can live in fresh or salt water.
- Mammals: this is the largest group of vertebrates that usually have a pulmonary apparatus and the ability to reproduce viviparously, so they need to come to the surface to take in the air. These types of marine animals include whales, killer whales or dolphins, which are mammalian animals that, despite living underwater, take in the air thanks to their blowhole or hole in their heads. Others, like seals or sea lions, live both in water and on land, and even in fresh water, like otters.
As you have just observed, the quantities of aquatic animals that can be found in the sea are very abundant, all of them leading their normal lives, with their functions and exhibiting their beautiful characteristics.
Life in the sea
It is scientifically proven that life was born in the sea, the number of types of marine animals that are known is immense, and almost all of them are part of the food chain of some peoples. What we usually think is that marine animals are only fish, but we have already seen that this is a mistake, since there are species that live in or near the sea in all animal families, among which we have mentioned mammals: dolphins, Whales; birds: penguins, cormorants, seagulls; reptiles: sea snake, sea turtle, except amphibians, since there is no marine amphibian, and it is believed that the reason is because amphibians evolved from other animal species, once they managed to leave the sea.
In the marine environment it is possible to find species that are fascinating, such as octopuses, which are capable of camouflaging themselves anywhere, managing to acquire the color and texture of the rocks or the terrain that surrounds them, whatever it may be. They are also known for their great intelligence, dolphins, perhaps the most intelligent animals on the planet, with a very sophisticated communication system that allows them to develop strategies for team hunting or to protect themselves from predators. Sometimes, stories have even been heard of dolphins helping shipwrecked people to survive or accompanying fishing boats, guiding them towards herring banks.
Types of Marine Animals in Danger of Extinction
The fishing techniques used by large companies and that are not very respectful of the marine environment, such as trawling, which literally sweeps the sea, dragging everything that is there, not only fish but plants, crustaceans, corals and everything that is in the environment.
The massive fishing of species that take years to procreate and that are therefore sensitive, and whose number is seriously diminishing, as is the case of the blue whales, 35 meters long and almost 200 tons, the white whale or the sperm whale, it is an activity that has environmentalists very concerned.
But it can be said that the main threat to marine species is found in the destruction of their habitat, water pollution and the use of the seabed as a landfill. An example of this irresponsible attitude of man towards the sea is the island of garbage that is floating adrift in the Atlantic Sea, which is the size of a community like that of Extremadura.
Next, we will focus on showing you some types of marine animals that are in danger of extinction, such as the dolphin, the blue whale, the manatee, the shark, the monk seal, the king salmon, the sea otter and many more. so let's make a list:
Dolphin
They are small cetaceans that have teeth, so their diet is carnivorous, they are marine animals that have their habitat in the temperate waters of the oceans, generally the Atlantic and Pacific. It has a body that is very aerodynamic and has small fins.
Dolphins can reach a length of up to 4 meters and weigh up to 300 kilos. They live in groups with a minimum of 6 individuals. These are at risk of extinction, since fishermen hunt them to sell them to aquariums or slaughter them as in Korea or Japan, where they are considered a delicious delicacy.
Blue whale
Blue whales are a type of marine animals that are mammals that come from the cetacean family and usually reach a length of 30 meters. It is a whale with smooth skin, which has a large layer in its lower section, as if it were a layer of thermal clothing.
Whales are creatures that are able to swim thanks to the fact that they have a caudal fin that is placed horizontally. These whales are at risk of extinction because everything can be used from their hunting, since oil is obtained from their fat, and their meat and bones are used as food.
manatees
The manatee is an aquatic mammal that is at extreme risk of extinction. For a long time, specifically, since the fifteenth century, these mammals have been confused with mermaids, because of the shape of their tails.
To this day, it is thought that the myth of the sirens had its origin in the description that it was made of a manatee, because they manage to communicate underwater, thanks to the emission of short-frequency sounds. These sounds can be heard by the human ear, so they could be confused with siren songs.
Shark
Their indiscriminate fishing is the main reason why these impressive animals are at risk of extinction. In fact, half of the species of sharks that inhabited the oceans have become extinct, and according to the information available to scientists, their population has decreased by 95%.
Moraine
The moray eel is a fish that has an elongated and narrow shape, which looks like a snake. It really is an animal that is very peaceful and calm, despite its appearance. These animals have their habitat in coral reefs, because their body allows them to move over them in order to feed.
One of their characteristics is that they have a poisonous skin and that they have two pairs of jaws, to be able to project one of them towards their prey and capture it, while the second serves to introduce it into their mouth.
Monk Seal or Friar Cofa
The friar seal, which has its habitat in the Mediterranean, which is also known by the name of the monk seal, is one of the strangest species because they do not have ears and it is found in the Mediterranean, but with the exception of the coast. of Morocco and the coast of the Bulgarian sea. It is a species that is at critical risk of extinction in a very short time, if urgent measures are not taken.
Another drawback is that around 80% of its specimens have disappeared, so there are less than 250 adult individuals left. It is vitally important to try to recover this species for the Spanish fauna, which is why there is an initiative to reintroduce them in the Canary Islands.
Royal Salmon or Chinook
Its normal habitat was in the Pacific Ocean, between Japan and California, but unfortunately today it is a species that can hardly be found. There are biologists who directly consider it a species that is at risk of extinction. The conditions required for the survival of king salmon are clean waters with low temperatures, so global warming has greatly affected them.
sea otter
Its habitat is in the North Pacific and we are referring to a unique species of the Enhydra genus, which is the sea otter, but unfortunately it has been disappearing from Japan to Mexico. This species is at risk of extinction due to indiscriminate hunting, particularly what happened between 1741 and 1911, from which it has not been able to recover. Even today, it is the object of poaching, a victim of conflicts between fishing vessels and has succumbed to accidents where oil is spilled into the sea.
Napoleon fish
Habitat from the Red Sea to Australia and is one of the most attractive species. The Napoleon fish is at serious risk of extinction due to overexploitation of the species. This fish can reach a length of two meters and weigh 200 kilos, they are hermaphroditic animals and are always female, their life expectancy is 20 to 30 years and they are not aggressive at all, and they do not cause harm to humans.
giant octopus
Yes, the giant octopus exists, although not with the dimensions that marine folklore has assigned them. Individuals have been sighted that have reached about 9 meters, although it is normal for them to measure a maximum of 5 meters.
What is to be done
Mainly, you have to know that the marine environment is a beautiful habitat, full of unique and fascinating species, which have to be known, respected and protected. The measures that must be taken are multiple and urgent, and the first thing that must be avoided is carrying out activities that are considered destructive to the seas and oceans and their species, particularly in relation to fishing and hunting techniques that they do not respect and they pollute. Likewise, there are measures that are within our reach, such as taking care of our beaches.
There are some non-governmental organizations that have set themselves the goal of promoting the care of the sea and of the types of marine animals, among whose initiatives is the captive breeding of some species that are at risk of extinction, such as sea turtles, which they have suffered the reduction of their food sources due to contamination.
Climate change as an agent of damage
As you can see in many publications that you can find, most marine species are at risk of extinction, as is the case with sharks, and a good part of the blame is the effect that climate change has produced, thanks to industrial activities. of the human being. If you are doing research in this regard, the websites of organizations whose objective is the defense of animals are an excellent source of information that you should not miss.
On these sites, you will be able to obtain a huge amount of data, photos, studies, videos and much more, so it is possible that in a single website you will obtain all the information you require and in a very accessible way. And, if you want to continue obtaining information about the types of marine animals and their ways of life and characteristics, as well as the dangers to which they are exposed, there are many other articles that you can read.
Where to look for information on the types of Marine Animals?
We have to mention that there are a large number of websites where you will be able to find all the images, videos and information that you require to be able to collect information to do all your tasks, or simply to satisfy your curiosity. In this sense, the most used are:
Internet in general: Internet is one of the places where more data is possible to find, for which you will only have to put in the search engine that you are using the words marine animals and you will find a thousand pages in which that you will find information about them. You will also have access to a large number of images as well as videos, so that you already know how to guide your search if you want to get a lot of information.
Online encyclopedias: you also have Wikipedia at your disposal, which is one of the largest encyclopedias that exist today. There you may find all the information about the life forms of the types of marine animals and their needs, as well as the dangers they are currently facing. There you will also find links to other pages that will be of interest, where you will be able to find information about all the species and read especially about the ones you find most interesting or the ones you need.
Mobile apps: we must inform you that you can search the Wikipedia apps for mobile devices for the same information that you would get from the website and you can use it and share it with whoever you want.
Educational platforms: There are educational platforms that are a great place to find information. There are several of them and it is certainly very easy to find them with a simple internet search.
Scientific journals with online access: on the internet it is also possible to have access to a large number of online journals in which you will be able to find all the information you are looking for about the types of marine animals. In general, you will be able to obtain different studies that have been carried out by species and you will also be able to find out about their current status, if their number of individuals has decreased, how climate change affects them, and much more.
If you liked this article, you may also be interested in reading: