One time I found a level 140 sarco. With a little difficulty I knocked it out. Then a pegomastex came. He hit the sarco. The pego died to me. My sarco was down to %27 taming effectiveness. This was very disappointing because it would have turned out even better but I still can complain because it’s still a high level. Make sure to put spikes around the sarco so this doesn’t happen.
I recommend taming one, they are super fast in the water, and they do a LOT of damage. I have tamed carnos and therizos but my one Sarco is the strongest one, I easily killed a megalodon and mine is only level 25, I only leveled up the stamina, speed and melee strength. Knocking it put is easy, just get it to follow you on land then throw some tranq arrows or darts to knock it out and feed it raw meat