Lusca

Earthquake admin events bring out Lusca, an Apex fish that the wiki tags as a hunt fish. It is taken by day, with Meteor or Stag Beetle as bait, and its minimum weight is a startling 1,000,000 kg. The overview adds that it comes from fishing in the ocean. The in-game text describes a terrifying hybrid of shark and octopus that guards the sunken passages of the deep, with a roar said to split coral and drag whole fleets beneath the waves.

The wiki's appearance section gives it three heads on a squid-and-shark body, red coloring all over, a mouth full of teeth and tentacles at the back that push it at high speed or strangle victims. On the fishing bar it moves erratically, a -95% progress speed penalty hits while you reel, and a shimmering sound plays on the hook.