Ask anyone who keeps freshwater tropical fish to name the top five most exotic, bizarre fish available to hobbyists, and chances are the black ghost knife fish will be in there. Besides looking ...

Researchers at Northwestern University have created a robotic ghost knifefish. It was no small feat: the ghost knifefish has a strange, ribbon-like fin that gives it incredible maneuverability, both ...

It has long been assumed that when one brown ghost knifefish “chirps” at another knifefish by altering the electrical field it produces, it is communicating with the other fish. But it appears that ...