Ugly fish shaped by darkness, pressure and scarce food

The fish in this collection include unrelated sharks, bony fish and broad multi-species groups. Their unusual features evolved independently, so a shared appearance does not imply close ancestry.

Food can be difficult to find in the deep sea. Anglerfish bring prey close with a lure, goblin sharks extend their jaws rapidly, and monkfish wait camouflaged on the seabed. Large mouths and teeth are feeding equipment, not decoration.

Pressure and capture also affect how people see deep-water fish. Blobfish tissue is supported by its environment, while many museum images show animals after nets, decompression and removal from water. A responsible comparison separates living anatomy from damage after capture.