Found most at the bottom of the sea on the island or on ragnarok you can find them in more shallow waters they also inflict torpor VERY FAST DO NOT ATTEMPT TO KILL UNLESS YOU USE ARROW they come in packs of 4-3
Be very careful about these-they do tons of torpor damage, I was down on the bottom of the ocean (on the island) and I saw a pack of these sea scorpions. I decided to dismount off of my mosa and kill them with my pick, as that would get more black pearls. When I got close to them one of them-a level ten hit me and knocked me out in one shot. I was level 88, wearing journeyman flak and apprentice riot. And they knocked me out in one hit. The moral of the story is that these things are very dangerous.