Learn how starfish got their shape after a complicated evolutionary process, starting with an ancestor that lived 500 million ...

The five arms of starfish are a relic left over from these ancestors. In the case of Cantabrigiaster , and its starfish descendants, it evolved by flipping upside-down so its arms are face down on ...

Most starfish have eyes on the tips of their arms. They’re hard to see and even if you spot them, you might not recognise them as eyes. But they can see you (as long as you’re not moving too ...

SOUTHAMPTON, UK — Starfish are known for their adorable and symmetrical arms that seem to hug everything they touch. But it turns out that they may not be hugs after all – because starfish ...

Starfish are known for their adorable and symmetrical arms that seem to hug everything they touch. But it turns out that they may not be hugs after all – because starfish, researchers found, are ...

How did starfish get their five arms? This is a question that puzzles zoologists. Marc de Lussanet, a biologist from the Institute of Psychology has now found an explanation. His theory is that the ...

So, a starfish’s arms are essential to its mobile, seafloor-cruising way of life. And yet the first echinoderms had no arms - not just Ctenoimbricata, but other species from the Cambrian Period ...

Remarkably, in some animals four arms were shed, leaving just one arm attached to the central body region containing the stomach, which is essential for survival. The neurohormone that was found to ...