Word for animals that live in water

Learn different types of Sea Animals Names in English with images. Sea animals are also called Aquatic Animals, Ocean Animals, underwater animals, marine creatures, or sea creatures.

These animals are such animals that live in the saltwater of the sea or ocean. These mammals are aquatic mammals that are based on the ocean and other marine ecosystems for their habitat. They include animals like seals, whales, sharks, dolphins, and octopuses. 

Sea animals may breathe air or extract oxygen that dissolves in water through gills which is a part of their respiratory system functions. 

Sea animals are also grown under freshwater such as a lake, rivers, ponds, etc. there are a lot of seas or aquatic animals that live under the water, not only fish. But also many of the creatures are unknown to us, but their habitat exists.

List of Water, Aquatic, Ocean, Sea Animals Name

Sr No.	Water Animals Image	Water Animals Name
1.		Shark
2.		Crab
3.		Octopus
4.		Penguin
5.		Platypus
6.		Goldfish
7.		Sea horse
8.		Dolphin
9.		Blue whale
10.		Prawns
11.		Jellyfish
12.		Oyster
13.		Piranha
14.		Seal
15.		Catfish
16.		Salmon
17.		Eels
18.		Tuna
19.		Walrus
20.		Sealion

All Water & Sea Animals Information With Pictures

Blue whale
The blue whale is a marine mammal, and it is the largest animal that has ever lived and is still present, which is far bigger than the largest dinosaur. It is also said that the weight of this mammal is the same as the Elephant’s weight.

Shark
The shark is considered the predator king of the ocean and sea. It looks like a streamlined torpedo, having five to seven gills on each side of the head, tough skin, and a large oil-filled liver.

Penguin
A black and white bird is unable to fly, but the wings are modified like gills that it uses to swim. This sea bird is mostly found in cold atmospheric locations. They spend half of their lives on land and the other half in water.

Dolphin
Dolphin is a marine animal that is also called the most intelligent marine animal among its species. Dolphins belong to the fish species from the whale family. 

Octopus
The octopus is a soft-bodied eight-limbed unsegmented animal of the order Octopoda. It is bilaterally symmetric, having two eyes and a beak along with a mouth at the center point of eight limbs. They trail their eight limbs from behind while swimming.

Seal
The seal is a web-footed marine animal, and also a mammal found mostly in cold seas looks tapered at the end and round at the middle which is very graceful for swimming.

Sealion
Sea lions are characterized by external ear flaps and long fore flippers which provide the ability to walk on four flippers, along with short thick hair and a big chest and belly.

Crab
Crabs are mostly found in the sea, and sometimes they come on the beach along with the waves. They are also found in freshwater, and on land, and are generally covered with an exoskeleton. It has a single pair of pincers from which they bite its prey. 

Piranha
The piranha is a member of the fish family Serrasalmidae. It is also found in the freshwater, American river, lakes, floodplains, and reservoirs. It is also known as the water predator, which mainly feeds on fish or sometimes eats plant materials, which makes it an omnivorous animal.

Sea horse
The sea horse is a marine animal that is an upright fish, and its face looks like a horse’s. They are very poor in swimming which swims using their dorsal fin on their back and moving with the pectoral fins.

Goldfish
Goldfish is a fish whose color is like the gold color. It is a freshwater, marine fish that belongs to the family Cyprinidae. This fish is very common when it comes to keeping an aquarium in the house.

Walrus
The walrus is a large flippered marine animal and also a mammal with a random distribution in cold seawater. It is the only living species from the Odobenidae family. 

Prawns
The prawns are little fishes that contain the largest pincers. Shrimps are bigger, which also means prawns have large claws on two pairs of legs. It generally contains five pairs of legs and a mustache. These fishes are mostly used for commercial purposes.

Catfish
Catfishes are a diverse group of ray-finned fish. Their order is defined by the swim bladder and skull and is also considered commercial fish. 

Platypus
Platypus is referred to as the duck-billed mouth marine animal and a semi-aquatic mammal that lays eggs. Some of its species had been seen in fossil records.

Tuna
Tuna is a widely edible species among fishes in the world. Canned tuna fish is also the most common source of mercury. 

Oyster
Oyster is the common name for some families of saltwater mollusks. These species are highly calcified and of irregular shapes and sizes. They are also consumed raw or cooked. Pearl oysters are also harvested for obtaining pearls for commercial benefits.

Jellyfish
Jellyfish also called sea jellies are mostly free-swimming marine animals with umbrella-shaped bells and tentacles. Their bells are so efficient they are used for locomotion underwater.

Eal
Eel is a common name for a fish that looks like a snake. This fish lacks a hind pair of fins, helping them to move in the mud and rocky shores.

Salmon
Salmon is another name for ray-finned fish from the family Salmonidae. They are intensively harvested in many parts of the world. They are also consumed as food on their excellent food quality and lower content of environmental contaminants.

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From Wikipedia, the free encyclopedia

An aquatic animal is any animal, whether vertebrate or invertebrate, that lives in water for all or most of its lifetime.^[1] Many insects such as mosquitoes, mayflies, dragonflies and caddisflies have aquatic larvae, with winged adults. Aquatic animals may breathe air or extract oxygen from water through specialised organs called gills, or directly through the skin. Natural environments and the animals that live in them can be categorized as aquatic (water) or terrestrial (land). This designation is polyphyletic.

Description[edit]

The term aquatic can be applied to animals that live in either fresh water or salt water. However, the adjective marine is most commonly used for animals that live in saltwater, i.e. in oceans, seas, etc.

Aquatic animals (especially freshwater animals) are often of special concern to conservationists because of the fragility of their environments. Aquatic animals are subject to pressure from overfishing, destructive fishing, marine pollution, hunting, and climate change. Many habitats are at risk which puts aquatic animals at risk as well.^[2] Aquatic animals play an important role in the world. The biodiversity of aquatic animals provide food, energy, and even jobs.^[3]

Fresh water creates a hypotonic environment for aquatic organisms. This is problematic for some organisms with pervious skins or with gill membranes, whose cell membranes may burst if excess water is not excreted. Some protists accomplish this using contractile vacuoles, while freshwater fish excrete excess water via the kidney.^[4] Although most aquatic organisms have a limited ability to regulate their osmotic balance and therefore can only live within a narrow range of salinity, diadromous fish have the ability to migrate between fresh water and saline water bodies. During these migrations they undergo changes to adapt to the surroundings of the changed salinities; these processes are hormonally controlled. The European eel (Anguilla anguilla) uses the hormone prolactin,^[5] while in salmon (Salmo salar) the hormone cortisol plays a key role during this process.^[6]

Freshwater molluscs include freshwater snails and freshwater bivalves. Freshwater crustaceans include freshwater crabs and crayfish.

Air-breathing aquatic animal[edit]

In addition to water breathing animals, e.g., fish, most mollusks etc., the term «aquatic animal» can be applied to air-breathing aquatic or sea mammals such as those in the orders Cetacea (whales) and Sirenia (sea cows), which cannot survive on land, as well as the pinnipeds (true seals, eared seals, and the walrus). The term «aquatic mammal» is also applied to four-footed mammals like the river otter (Lontra canadensis) and beavers (family Castoridae), although these are technically amphibious or semiaquatic. There are up to one million types of aquatic animals and aquatic species.^[7]

Amphibians, like frogs (the order Anura), while requiring water, are separated into their own environmental classification. The majority of amphibians (class Amphibia) have an aquatic larval stage, like a tadpole, but then live as terrestrial adults, and may return to the water to mate.

Certain fish also evolved to breathe air to survive oxygen-deprived water, such as Arapaima (family Osteoglossidae) and walking catfish.

Most mollusks have gills, while some fresh water ones have a lung instead (e.g. Planorbidae) and some amphibious ones have both (e.g. Ampullariidae). Many species of aquatic animals lack a backbone or are invertebrates.^[8]

Importance for environment[edit]

Aquatic animals play an important role for the environment as well as human’s daily usage. The importance of aquatic animals comes from the fact that they are organisms that provide humans with sources such as food, medicine, energy shelter, and raw materials that are used for daily life.

Each aquatic species plays a different role to help us make every day easier, healthier, and also more productive. They also help with the atmospheric pressure and global climate change.^[9]

See also[edit]

References[edit]