Other anglerfish species mate permanently: The male's head "melts" into the skin of the female and it gives its life entirely ...

In most vertebrates, the absence of adaptive immunity would be catastrophic, but in some deep-sea angler fish species ... or do anything a fish would ordinarily do to mate. Instead, the male—just a ...

A rare predatory fish which lives 2,000 metres below sea level has been spotted in broad daylight. Spanish shark researchers ...