Fish are aquatic vertebrate animals that have gills but lack limbs with digits, like fingers or toes. Recall that vertebrates are animals with internal backbones. Most fish are streamlined in their general body form. The word fish is the same whether it is singular or plural—you can talk about one fish or ten fish.
What defines a fish from a mammal?
Fish – Fish live and breathe under water. They have scaly skin, fins to help them swim and they breathe through gills. Mammals – Mammals are animals that breathe air, grow hair or fur and feed on their mother’s milk as a baby.
Are sharks a mammal?
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.
Is fish a bird or mammal?
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 a fish classified as? – Related Questions
Is snake a mammal?
So, are reptiles mammals? No, reptiles aren’t mammals. They’re a category of animals that includes lizards, snakes, alligators, and crocodiles. Our first records of these creatures date back 315 million years to fossils from the Paleozoic era.
Are fish animals Yes or no?
Fishes are a group of animals that are completely aquatic vertebrates that have gills, scales, swim bladders to float, most produce eggs, and are ectothermic. Sharks, stingrays, skates, eels, puffers, seahorses, clownfish are all examples of fishes.
Is dolphin a mammal?
Dolphins are mammals, not fish
Like every mammal, dolphins are warm blooded. Unlike fish, who breathe through gills, dolphins breathe air using lungs. Dolphins must make frequent trips to the surface of the water to catch a breath.
Are turtles a mammal?
Turtles are reptiles of the order Chelonii or Testudines characterized by a special bony or cartilaginous shell developed from their ribs and acting as a shield.
Is a chicken a mammal?
Chickens are not mammals.
They have feathers as opposed to hair or fur, and they have wings, even though they don’t fly very well. They lack the teeth that most mammals have, they exclusively lay eggs, and they don’t nurse their chicks with milk.
Is a penguin a mammal?
Yes, penguins are birds, although they are flightless birds. Lots of people think penguins are mammals rather than birds because they can’t fly, and we see them swimming underwater or waddling on land instead.
Is Octopus an mammal?
It’s a great guess, but an octopus is not a mammal. An octopus is an invertebrate animal, which means it has no spine. More specifically, an octopus is a cephalopod, like squid and cuttlefish. They’re some of the smartest invertebrates.
Is Crocodile mammal?
Crocodiles are large reptiles found in tropical regions of Africa, Asia, the Americas and Australia. They are members of the order Crocodilia, which also includes caimans, gharials and alligators.
Is Frog a mammal?
Amphibians are frogs, toads, newts and salamanders.
Is a dolphin a mammal fish or reptile?
Dolphins are part of the mammalian order Cetacea, which contains about 90 species of whales, dolphins and porpoises.
Why dolphin is not fish but mammal?
Dolphins, whales, seals, sea lions, and otters are all mammals. They give birth to live young and nurse their young with milk. In contrast, even though some sharks give birth to live young, sharks are fish.
What are the 3 kinds of mammals?
Mammals can be generally classified into three broad groups: egg-laying monotremes, marsupials, and placentals.
Is whale is a mammal?
Whales and dolphins were once land mammals before they evolved into the ocean-going mammals we see today. Just like humans, some dolphin species have hair, called lanugo, on their bodies shortly after birth.
Is a crocodile a mammal?
Crocodiles are neither mammals or amphibians. They are reptiles even though their lifestyle most closely resembles that of amphibians in that both kinds of animal are semi aquatic. They differ from amphibians in their physiology because for example crocodiles do not breathe through their skin like amphibians.