A single crown-of-thorns starfish is impressive. This unusually large, sinister-looking sea star grows to 3 feet in diameter with as many as 19 spiny arms. It’s hard to miss on the reef, where it ...

Starfish are fascinating and contradictory creatures – they may look a bit like stars but they are certainly not fish. As you can see in the above clip, they can even walk with a mesmerizing and other ...