There are too many tips on the baryonyx for anyone to find mine so I'm doing it here if you use the baryonyx tail spin attack on the ammonite then it doesn't call for help so I suggest using a baryonyx when hunting Ammonites
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
There are too many tips on the Baryonyx so I'm doing it here as well if you use the Baryonyx tail attack on the ammonite the ammonite won't call for help so I suggest using the Baryonyx when hunting ammonites