If you or anyone else that trusts you have a tusotuethis (giant squid), you can grab ahold of it and knock in out in the tuso’s tentacles making it an easy ko. To do this you would need to have atleast 2 people.
These guys are great and super fast and also very strong. Warning when your gonna go tame these guys bring a sarco or an icthy , they also spawn In 2,s or 3,s so be careful because these guys do a crap ton of damage .
They can't fit through the resource caves' entrances. Just lure it into one and pull out your crossbow/harpoon gun for the knock out. Just be aware of any nearby megalodons, as they can fit into the cave easily and ruin your swimming session.