Best answer
Starfish aren’t fish
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What is a starfish?
Starfish aren’t fish – finned, tailed animals with backbones – they are echinoderms, which are marine invertebrates. So scientists prefer to call these animals sea stars. Sea stars come in all sizes, shapes and colors. Their most noticeable characteristic is their arms, which form their distinctive star shape.
Are starfish invertebrates or vertebrates?
Starfish are invertebrates with multiple radiating arms. Starfish, or sea stars, are echinoderms in the class Asteroidea, characterized by their distinctive bodies, which look rather like stars. Despite what the familiar name suggests, they are not fish.
Is a sea star a fish?
Sea stars used to be called 渟tarfish?although they are not fish at all. They are echinoderms, members of the same club as sea urchins, sea cucumbers, sea lilies, and sand dollars. So, what is the difference between sea star and starfish?
How many different types of starfish are there?
There are around 1,800 species of starfish, ranging from the sunflower star, a species with a multitude of arms, to the bat star, one with five connected arms that looks a little like a pentagonal coaster. They come in an array of colors, shapes, and sizes, and they eat a wide assortment of marine life.