Why are sharks fish?
In: Biology
Shrimps and crabs belong to a group called crustaceans. They have hard external skeletons and jointed legs, while fish have internal skeletons and fins. Crustaceans breathe with gills under their shells, whereas fish have gills on the sides of their heads. Crustaceans walk or crawl using their legs, while fish swim with their fins. Lastly, shrimps and crabs are arthropods (like insects and spiders), while fish are vertebrates, meaning they have backbones.
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