What exactly is this unusual blue sea creature? Get to know one of the more unusual members of the sea slug family in our ...

Spotted off the coast of Mexico’s Guadalupe Island, Deep Blue seems remarkably unbothered as she floats past some divers, two of whom are inside a relatively flimsy-looking cage, but one who seems ...

Beneath the ocean's crushing blackness lies an ecosystem that ... This is the only fish that produces red bioluminescence Many deep-sea creatures give out blue light called bioluminescence - but the ...