Dreadnautilus

The Dreadnautilus is a miniboss that is summoned by Fishing at an Ocean during a Blood Moon

Attacks

 * It will spin around the player for about ~3 seconds

Tips

 * It is recommended to have a arena set up with platforms for battling Dreadnautilus.
 * Cannot be fought if a biome takes priority over the Ocean (A Graveyard, for example)

Trivia
It resembles a