The sand dollar—AKA "sea biscuit" or "sand cake"—is purple and hairy in its prime. See nine things you didn't know about these fascinating creatures.

A rare and extraordinary natural event unfolded at Karachi’s Clifton beach as millions of oysters washed ashore.

It also shares the petal-like pattern both inside and out of other sand dollars. This same pattern and spiny-ness is also shared by sea urchins, another echinoderm that lives in Maine.

Beachgoers are being advised to steer clear of a particular type of shell known as the cone snail, which may look harmless but is actually one of the ocean's most dangerous creatures ...

Microscopic claw hairs help hermit crabs sense threats and make quick decisions, revealing a link between anatomy and ...

Scientists at the University of Southampton have developed a new way of analyzing fossils, allowing them to see how creatures ...

We have made shell mobiles, arranged shells in patterns to make picture frames, ... My sister, Leanne Peek, is an artist and framed the shell with sand and a sky-painted background.