Dododex
ARK: Survival Evolved & Ascended Companion
Tips & Strategies

Gives you and your shoulder mount oxygen when you ride it on the underwater.
Used mine as a command station for me to give orders from and beat the easy water cave, while riding it.
Went a little crazy in the other one I did it with a spino and the giga fly, almost went horrible wrong three times.
More Diplocaulus Utility Tips
These guys are the kings of trilobite hunting. Not only do they deal additional damage to them, they're great at collecting chitin, oil, and pearls. Other perks: they don't need a saddle to be ridden while in the water, they provide you with oxygen underwater, and are faster than just about anything while swimming. Super underrated mounts imo.
Please listen to me! I haven't had these guys for long, but I noticed their healing was very low, about 0.1, while on land. When I went into the water with it so it could swim, the healing went up to about 1.2 per second. But the biggest thing is, I force fed it meat to heal, like with all carnivores. If you do this in the water, it heals hundreds with just a few pieces! I am going out to the seas in a bit. Knowing this healing factor will help a lot!