These bad boys have insanely high hp, weight and damage aswell as a bubble breath which can push back enemies super far on land and can push enemies to the surface and stun em when in water. To top it all off they also have a platform saddle and are stupidly good at climbing things so you can use them for fights and holding a ton of stuff such as a base without being too restricted on where you can go
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?