Dreadnautilus

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The Dreadnautilus is an optional Hard Mode mini-boss found in the Journeys End update. The Dreadnautilus can be summoned by fishing at one of the two oceans in your world during a Blood Moon with Hard mode enabled.

Do not get this mini-boss confused with the Duke Fishron boss, which is also a hard mode enemy that is found by fishing in one of the oceans. If you want to summon the Dreadnautilus, do not use the Truffle Worm. if you use this type of bait even on a blood moon, it will spawn Duke Fishron.

It drops the Sanguine Staff, Chum Bucket, Blood Moon

and Bloody Tear. (I made the page myself, and I'm too lazy to make the others.)

Dreadnautilus
(See image of boss above)
Information
Type	Enemy
HP	7000
Defense	24
Drops	Sanguine Staff (50%) 7-10 Chum Bucket (50%) Blood Moon Monolith (11.11%) Bloody Tear (11.11%)

Trivia

• This is the first mini-boss of the blood moon event.
• It's the only mini-boss that can be summoned via fishing.
• The mini-boss was released in 1.4.0.1
• It's old placeholder name was "blood nautilus."