If you’re going to the arctic, bring a raft, cause these guys, along with scorpions, allosauruses, trexes, sabers, and carnos will shred you in seconds. But when you’re on your raft they can’t touch you. Good farming item caches from dead creatures. DO NOT LEAVE YOUR RAFT!!!!! SHARK ZONE!!!!!
If you ever encounter one in the wild, and you are in an early stage in the game, run the opposite direction. Also try not to agrovate it unless you are up to the KO/Fight.
Good luck if you encounter it!