If you're carrying a tamed Doedicurus in your claw the Doedic will automatically start harvesting any stones you hover him over. Just start pumping points into your Doedic's weight because it will stop at about half of its own carry weight. I've yet to discover another tame it will work with though...
Be careful when carrying a Dino that has a tribe mate mounted on it. I was walking up a hill carrying my anky with a tribe mate on it and they went under the map and died. RIP ANKY AND SHINEHORN. Tribemate was eh anyway.
An all around amazing tame with a variety of uses. Hunt trilobites for oil. Carry armadillos for farming stone and clearing paths. Delicately plucking dinos off an elevator. Exploring. Farming gems from rats. The list goes on and on, just be creative. Its almost OP but it is hard to tame. Not only do you need a catapult but you also need to score only body shots and even then pray that its strong enough to survive the hits. It's tanky, uses surprisingly very little stamina, has a good attack even without the grab, well worth the trouble.
Hands down the best water cave runner. If you can transfer a karkinos to the island they can easily run both the cavern of lost hope and lost faith without aggroing many creatures. Mosasaurs, jellyfish, and eels all ignore the karkinos making those caves a cakewalk. Even better, the tusoteuthis cant grab the karkinos either.
If you tap the inventory key as fast as you can while airborn on your karkinos, it will glide almost forever.
Over long distances it'll almost be faster than a rock drake as it keeps on building up speed using this trick.