Dreadnautilus

The Dreadnautilus is a Hardmode enemy summoned by Fishing during a Blood Moon. It is one of the five enemies that can be summoned by fishing during a Blood Moon during Hardmode, as well as the Wandering Eye Fish, the Zombie Merman, and the two other Hardmode-exclusives, the Blood Eel and the Hemogoblin Shark. The Dreadnautilus is rarer than the other four Blood Moon fishing enemies, occurring only 1 in 10 spawn attempts (on average), and is also considered the most difficult to battle.

Attacks

 * Spins around the player for roughly 3 seconds. Upon contact, it will damage the player.
 * While this attack is charging, Dreadnautilus will face away from the player and will reflect projectiles.
 * Rapidly fires a spray of red projectiles at the player. During this phase, the boss will turn invincible.
 * Briefly glows illuminant crimson and summons three red symbols.
 * Spawns multiple Blood Squids, which will attack the player.

Tips

 * Summon weapons are useful for handling the Blood Squids while the player focuses on the Dreadnautilus.
 * Using the Chum Caster gives the player a greater chance of finding the Dreadnautilus and other blood moon fishing enemies, this combined with Chum Bucket s will give the player the best chance to find them. The use of Sonar Potions will allow you to skip past other blood moon fishing enemies, letting you fight the Dreadnautilus more over the course of the night.

Trivia

 * It is the only boss or mini-boss without a boss bar.
 * It is one of the only mini-bosses lacking a trophy and any Expert or Master mode drops.
 * It resembles a.
 * Its name is a portmanteau of "Dreadnought" (a class of warships) and "nautilus."


 * Its original name was "Blood Nautilus" in an official trailer.