Which animal could be a fish?

fish, any of approximately 34,000 species of vertebrate animals (phylum Chordata) found in the fresh and salt waters of the world. Living species range from the primitive jawless lampreys and hagfishes through the cartilaginous sharks, skates, and rays to the abundant and diverse bony fishes.

What is the closest animal to a fish?

Tiktaalik lived approximately 375 million years ago. It is representative of the transition between non-tetrapod vertebrates (fish) such as Panderichthys, known from fossils 380 million years old, and early tetrapods such as Acanthostega and Ichthyostega, known from fossils about 365 million years old.

Can mammals be fish?

Even though they live in the ocean all of the time, dolphins are mammals, not fish. … Other characteristics of dolphins that make them mammals rather than fish are that they give birth to live young rather than laying eggs and they feed their young with milk.

Is every animal a fish?

Every branch on the tree of life is considered to be a member of all its parent branches. This means, for example, there can be no definition of fish that does not include everything that evolved from fish. … Mammals evolved from animals that evolved from amphibians, so mammals are fish.

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Is a shark a fish?

Are sharks fish? Sharks are fish. They live in water, and use their gills to filter oxygen from the water. Sharks are a special type of fish known because their body is made out of cartilage instead of bones like other fish.

What is a fish a mammal?

Fish are not mammals because most of them are not warmblooded, though some sharks and species of tuna are exceptions. … They lay eggs or give live birth, but no fish nurses it’s young with milk, an action that separates mammals from every other type of animal.

Is a duck a mammal?

Ducks are neither mammals nor amphibians. They are birds. All birds belong to the taxonomic class Aves.

Is a seahorse a fish?

From a scientific perspective, seahorses are classified as fish. … Seahorses spend a lot of time in one area by wrapping their tails around underwater plants or coral. In some species, male and female seahorses form monogamous breeding pairs – that is, they mate for life.

Is fish a wild animal?

In contrast to mammals and birds, fish have traditionally not been considered as wildlife (Wadewitz 2011) , so management efforts have traditionally focused on attempting to ensure sustainable yield rather than setting aside large areas for wildlife conservation. …

Are whales fish?

So, are whales fish? Whales are not fish. As we’ve described, whales are warm-blooded while almost all fish are cold-blooded. Fish also breath through gills while whales have lungs and breath air from above the ocean’s surface.

Is a fish a fish?

The most common plural form of fish is indeed fish. However, under certain circumstances, you can use fishes as the plural form of fish. Fish can refer to multiple fish, especially when they are all the same species of fish. …

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Is an octopus a fish?

Both fish and Octopus share the same classification strata of the Animalia family. Fish are known as Chordata, and octopuses are known as a mollusk. Also, fish have a skeleton and backbone, which make them vertebrates. On the other hand, octopuses have no skeleton and spine, so they are invertebrates.

What are the 10 most popular fish?

10 Most Popular Fish Make Up 90% of Volume

Shrimp 4.0 Shrimp
Canned Tuna 2.7 Canned Tuna
Salmon 1.999 Salmon
Tilapia 1.450 Alaska Pollock
Alaska Pollock 1.192 Tilapia

Is a starfish a fish?

Sea stars, commonly called, “starfish,” are not fish.

Sea stars live only in saltwater. … Tube feet also help sea stars hold their prey. Sea stars are related to sand dollars, sea urchins, and sea cucumbers, all of which are echinoderms, meaning that they have five-point radial symmetry.

Is Stingray a fish?

Stingrays, with their wide, flat bodies, may not look like fish, but they are. They are related to sharks, and like their shark cousins, they do not have bones. Instead, their bodies are supported by cartilage—the same material that you feel inside the tip of your nose.

Is a jellyfish a fish?

Jellyfish are not really fish, of course, because a fish’s anatomy is centered around its backbone, whereas the jellyfish is a dome-shaped invertebrate. … The cnidocytes on jellies’ tentacles discharge venom from a sac called a nematocyst. These help them to capture floating prey in the water column.