Just go to eldrich zone on crystal isles and look for big bubbles that have some black clams/oysters inside of them, put your angler fish inside the bubble, harvest, and enjoy the best black pearls harvester in the entire game, super easy, rank up for people to see this.

first tame an ichthy then go to rag about 75,23 more black pearls then you can carry on the sea floor and not to dangerous just keep an eye out for megs

When low level tame otter and make it kill fish there is a chance it will get a black pearl

If u play at Ragnarok just get to the ship in vicking bay and farm a lot of black pearls

If You Have Tuso You Can Easly Kill Alpha Mosa Or Tuso

Kill tusos sea scorpions nautilus and alpha mosa and tuso

Times 1.5 farming and I got ~15 with a bloodstalker from a group of 4-5 sea scorpions. If your bloodstalker has a lot of movementspeed its the best for farming black pearls.

Use otters it’s fun and there cute.

On crystal isles go to the elderich isles and youll c some giant watery orbs. U can actually go inside them and swim around. Youll c some black clam/oyster lookin things. If u pick those up like u would to berries from a bush youll get black pearls. Just be careful as eels and other annoying things can spawn in the orbs.

If u go to rag and get scuba or a water dino go down into the water at Viking bay near the cave and kill this shrimp things u get A BUNCH OF BLACK PEARLS