Anglerfish

The Anglerfish is one of the minor antagonists in Finding Nemo.

Finding Nemo
In Finding Nemo, the anglerfish entices Marlin and Dory in a dark chasm with its glowing dorsal fin before chasing them, as the two fish try to search for P. Sherman's diving mask.

After the credits of the movie, the anglerfish is eaten by Blenny (who overcomes his fear of sharks and other scary fish) in a single bite.