Dododex
ARK: Survival Evolved & Ascended Companion
Tips & Strategies

If you want to imprint remember they can't get out of water, so to bypass the take oxygen option you can cryo it or use DS to reset what it wants. You will ask it to follow you (always underwater) a couple dozens of meters and cryo it again ultil it gets the +imprint from "wants to go on a walk with you" since that one doesn't require any interaction other than a whistle. I use a baryonyx to clear the place I'm in, set it to aggressive, to follow me, and objective distance=long.
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!