User blog comment:SkeletonGuyYT/Fishron/@comment-35198074-20181127202935

Pre-Plantera = Mega-Shark, Lightning Boots, Walking Waters Potions, Swiftness Potion, Jetpack, and Teleporters(Opional). Suggested armor is Hallowed armor with helmets, but you can use whatever armor you want for this battle.

First of all, make sure you're faster than Duke Fishron. You can do this be stocking up on Swiftness potions, which, namewise, makes you go faster. If you dont have these, then you can use Jetpacks. the reason I suggest Jetpacks is because Jetpacks has a feature where you can shoot yourself up. All other wings do not have these. This ability will help you escape Duke Fishron for a short amount of time.

However, if you like mechanics, you can set up some traps and use teleporters to easily destroy Duke Fishron(If you do it right)

However, if you are Post-Plantera, this makes everything much easier. First of all, you have a 50% chance to get a hold of Vampire Knives. The reason I bring this up is because Vampire Knives is a much better way to heal rather than potions. Also, if you feel like clicking alot of times, then you can use Paladin's Hammer, but it's not suggested. Good luck on you fishing trip!

(Disclaimer: If you don't have enough gold to buy a Jetpack or you don't have Steampunker, then feel free to use gravitation potions at your own risk.)