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.