If you are on old mobile and you wanna craft tek structures or items that cost a fortune of these things to craft, then do the "violent dance of the amphibian" dungeon as it is one of the dungeons that is available in the dunegon menu permanently as long as you have internet since the devs gave up on this game so they gave us these dungeons

Once you enter the dungeon find and open the featured loot chest and hope you get 100x black pearls (you can save scum on singleplayer)

The dungeon boss is reletively easy too it's just the Beelzemorbus and with this specific dungeon you will also get 60 element instead of 20.

After you complete the dungeon it will cost 5 amber to enter so you can wait until 8 pm est for the entry cost to decrease to 0 amber again then grind it until you have enough black pearls

Alpha mosasaur drop alot of black pearl

My gacha is pooping black pearls 😩

On mobile single player, frankly, nothing works better than this: save before accepting your gift, then restore over and over until you are gifted 20 black pearls. Clearly lazy, but faster than the alternatives.

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

Kill alpha mosa 100 pearls kill like 3 packs of eurtrpids 150 pearls now get tek replicator

Also dropped by alpha tuso and mosa

On Astraoes, the grand tortug is the best for farming and transporting black pearl by the thousands

I'm on mobile and usually play on unofficial but the way I get tons of black pearls and bio tox is just get a high lvl basilos then go around the sea floor and just kill everything

70 20 cords on rag, you can get like 2000-7000 on this pearls.

Don’t even bother trying to find this on mobile

Instead of going into deep water for sea scorpions

Use an otter and command it to kill and eat fish (note- it won't get any pearl if you attack it)

Once they eat it they will do a little animation and you got your pearl!

I would recommend trying on coelacanths cause salmons are too dangerous

If you're on singleplayer and you see trilobites or ammonites leave your game then put dino or player damage all the way up to max, then join, kill the ammonite/trilobite, use a sword or high damage tame to harvest the corpse, and you will get black pearls in the 2 digits instead of 1 or 2 with 1.0 player or dino damage.

Nobody will know since everybody can edit dino or player damage, and nobody will blame you.

The one best way on island is to get black pearls by killing alpha mosa they spawn common behind carno or dead island or by erypterid sea scorpions they droop too

They have a rare chance to be loot from fishing

If you’re on ragnarok, go to the sunken ship with a spino that has a couple points into weight and damage , then farm the eurypterids that spawn there for insane black pearls. Since they spawn so often, you can keep going there are get way more black pearls that you’ll need

Fishing on mobile gives this, easiest and non risk method (i tried with leech blood in a river)

Otters gather black pearls (along with silica pearls) when they are told to target and kill fish. I’m pretty sure they get more pearls with a higher melee stat too

Gachas get about 60 per good crystal if you’re lucky or they get 25-30

Heeps of Black Pearl's in a sunken ship , Ragnarok cor 48.6 long , lad 04.5 . And you'll need to bring friends or tames with alot of weight. I gathered over 2k black Pearl's here.