Lurking in oceans from the tropics to the Arctic, a tiny transparent creature with barrel-shaped body and visible orange ...

When sonar first picked up a massive, stair‑like object on the floor of the Baltic Sea, the image looked less like geology and more like a movie prop. The structure’s circular outline, sharp edges and ...

Non-native and rare species of sea slugs described as looking like aliens have been found by a group studying rock pools. The depilatory sea hare (Aplysia depilans), usually found in the eastern ...