1. Knock it out with any tranq weapon of your choice

2. Add superior kibble or a higher grade one (if no kibble is available for you, you can feed it less effective food like berries -> crops -> or archelon algae(algae is best of these 3 other options))

3. Enjoy your new tame without a saddle or you can craft a normal saddle to ride it with bonus armor or a platform saddle where you can build stuff on it.

4. On PC: press C to open/close shell. Closed shell while riding it gives you unlimited oxygen.

LMB: for normal bite attack / RMB for tail whip. You can only attack when shell is closed. Press X to walk on the sea floor. (Careful I heard somewhere that it can get fall damage in walking mode in the water while walking there and falling down an abyss)

5. It can farm black pearls with a good amount of weight reduction on these.

Overall the new best gatherer for blackpearls due to its high weight stat and weight reduction on blackpearls!

!!! It cannot harvest Silica Pearls as far as I know !!!