Way to collect black pearls
1. Get a good scuba tank, crossbow (and arrows obviously) and ascendant pick
2. Get a water mount (Plesio,Meg,ichty)
3. Circle the ocean, stay at the bottom and keep killing ammonites and eurypterid with crossbow and harvest with pick until you find alpha mosasaur.
This creature could be used to up a already really powerful sea creature by utilizing its distresss, call. 1: hit it 2: get out your sea creature, 3: get out you frogz 4: forget actually getting ready for this 5: drop your tribe mate into the action (with handcuffs) 6: wait for the creatures to leave, steal his stuff