"Run Away and Never Return!", this "Anglerfish," has been marked for deletion. Reason: Not a villain. It's just a predator seeking to eat smaller fish, and nothing indicates that it's evil. There's nothing in the game or movie that shows that it kidnapped Marlin. It was trying to eat Marlin like a normal animal, not kidnapping him.
Be Prepared for it to go away forever!! So says Scar: the true king of the Pride Lands.
NOTE: Although the Anglerfish is an antagonist, but not a villain in the film, it was a villain in the Finding Nemo video game due to kidnapping Marlin in its mouth.
The Anglerfish is one of the minor antagonists in Finding Nemo.
Role in the film
In Finding Nemo, the anglerfish entices Marlin and Dory in a dark chasm with her 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.
The anglerfish is female, as only females possess the glowing bait that characterizes the species. They are also larger and more dangerous than males.
The Anglerfish appears in Up during Carl and Muntz's fight when Muntz strikes one of his exhibits with his sword.