Mesmerising Video Shows Swimming Feather Star loading...
Mesmerising Video Shows Swimming Feather Star
The marine invertebrate, which is known as a living fossil, was filmed in Thailand.
Meet the Chocolate Chip Starfish And It's Unusual Relatives loading...
Meet the Chocolate Chip Starfish And It's Unusual Relatives
Super gooey slime stars and a predatory “monster” starfish from Antarctica are among nature’s most fascinating invertebrates.
Vinegar Could Save The Great Barrier Reef loading...
Vinegar Could Save The Great Barrier Reef
The acidic condiment is a powerful weapon
Starfish-Killing Robot To Save The Great Barrier Reef loading...
Starfish-Killing Robot To Save The Great Barrier Reef
In a world-first, the robot will battle an overpopulation of crown-of-thorns starfish
About Starfish

Marine scientists have undertaken the difficult task of replacing the beloved starfish’s common name with sea star because, well, the starfish is not a fish. It’s an echinoderm, closely related to sea urchins and sand dollars.

There are some 2,000 species of sea star living in all the world’s oceans, from tropical habitats to the cold seafloor. The five-arm varieties are the most common, hence their name, but species with 10, 20, and even 40 arms exist.

Fast Facts 

Type: Invertebrate

Diet: Carnivore

Average life span in the wild: Up to 35 years

Size: 4.7 to 9.4 in (12 to 24 cm)

Weight: Up to 11 lbs (5 kg)

Did you know? Sea stars have no brains and no blood. Their nervous system is spread through their arms and their “blood” is actually filtered sea water.

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