Avoid Carnotaurus until you have flak armor. They are faster than you and trap you in their arms. If you run into them you will certainly die if not prepared. If you have no other choice try to find a large rock/cliff to shoot arrows from. They have lower health than a triceratops or turtle. If everything else fails use a boat or get them in deeper water and pike their feet.
Carnos are a good start for tames that deal good damage. If your a high enough level and see a whole pack of these, not a big deal, mow it down but if you even see a glimpse of a alpha carno.. please run. I brought my lvl 14 Rex and two carnos to carno island to get obsidian and we all got absolutely destroyed..
So back when i was a new ark player i tamed 8 raptors just for defense, later on i spotted an alpha carno walking down the beach towards my base, and not wanting my newly tamed sarco, and trike to die, I did something any normal person with 8 raptors would do. Me and the pack and charged into battle, lets just say i lost all but one, Silver. Shes still alive today and happy, And we did kill the alpha carno.