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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 sea stars fish?
Sea stars, commonly called, starfish, are not fish. There are approximately 2,000 species of sea star, all of which live in marine waters.
Is it illegal to name a starfish sea star?
Unauthorized use is prohibited. Marine scientists have undertaken the difficult task of replacing the beloved starfish common name with sea star because, well, the starfish is not a fish. It an echinoderm, closely related to sea urchins and sand dollars.
How many arms does a starfish have?
Sea stars, commonly called, starfish, are not fish. However, this does not mean that all sea stars have five arms and species with 10, 20, or even 40 arms exist! If one of these arms is lost, a sea star has the amazingly ability to regenerate it.