Great for farming Black Pearls for end game items such as the Tek Replicator, but they are very hard to find underwater so finding them can be a challenge. If you’re looking for these creatures I’d recommend scuba gear and high level water dinos just in case you run into a situation with a aggressive water dinos (Mosas, Plesis, Megladons, Squids, and etc.) One more tip, don’t let the Eurypterid attack, because of their poisonous attacks that can knock you out using a crossbow to kill them from a range is highly suggested.