As endangered sea turtles return to local waters, a carcass on Martha's Vineyard shore serves as a reminder for boaters to keep watch, advocates say.

Swimming through the shadowy waters off Palau, scuba divers watched life on a coral reef after dark. One reddish sea creature ...

The elusive oarfish, dubbed the "doomsday fish," is steeped in folklore, particularly in Japan where it's seen as a harbinger ...