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Eurypterids give terrible amounts of black pearls and are very hard to find (On the island at least). Take a Basilosaurus (It doesn’t have to be great, mine was level 60 when I found it) and kill tusotuethis, Alpha Tusotuethis and Alpha mosasaurs. Alpha mosasaurs give 100 black pearls and normal tusos give around 30-50. Alpha Tusos give around 80. So, best thing is alpha mosasaurs, followed by alpha tusos, then normal tusos. OPTIONAL: Bring a dunkleosteus as a pack mule as they reduce weight of black pearls by 50%, so you can carry more and your basilo won’t be slowed down to a snails pace.

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