Scientists think the sea creatures have evolved over time to shed their bodies to eventually become only heads! Find out more here.
Starfish Are Basically Walking Heads, and Literally Nothing Else
Starfish arms are their heads, new study suggests - BBC Newsround
Starfish don't have a body - they're just a big squished head
Oh God Those Aren't Arms on Starfish, Scientists Say
Starfish arms are their heads, new study suggests - BBC Newsround
Starfish are all head, no body, new study finds
Oh God Those Aren't Arms on Starfish, Scientists Say
Starfish don't have arms, they are 'heads that can crawl
Starfish Are Heads--Just Heads
Starfish Are Heads--Just Heads
Deep-sea creatures: Brittle sea star and other unusual fishy finds - BBC Newsround