New research delves deep into the meaning behind these big-mouth contests. When male sarcastic fringeheads get aggressive with each other — which they often do — they open their unusually wide ...

The bigger fish, with larger jaws, tended to win these contests. Both in the wild and in the lab, the team didn’t see males gaping wide at females. Instead, they appear to court them with ...

When told about a strange, fanged fish that had washed ashore on an Oregon beach, ... which had fanged teeth within a wide mouth and measured nearly 5 feet long, as a longnose lancetfish.

Rare deep sea fish found on Carlsbad beach now part of vast Scripps research collection ... "But when I got a closer look, I noticed its large, wide mouth filled with sharp, ...