Tamed you'll be able to build on its back. When diving he provides an oxygen bubble on his back allowing you to submerge your base on the floor of the ocean.
Are you turtley enough for the turtle club?
Fun fact use it in the lunar biome to gather stone, crystal, wood thatch fiber like crazy from lunar bushes, go to the Arctic to get sap from trees, go to ocean to get silk and plant y seeds and big biome for plant x from those narco plants. Volcano needs testing to see what it's good for. Enjoy building stone behe gates in lunar :)
Passively generate rare flowers and mushrooms with seeds in its inventory. Collects fiber like crazy. One of the only that can collect silk and y seeds on genesis efficiently. Mine has 20k hp 400m (145 perfect tame) 120 armour saddle, and has killed a 150 x mosa. It's safe to say these dudes are AMAZING.