The best method I found to harvest these guys is to fly around on a lightning wyvern and find a group in shallow water and blast them with your beam. Works pretty good can kill the whole group in one shot if your accurate with the blast. Just be careful you don’t hit the water with your wyvern or you’ll fall into a horrible horrible death.
Very easy to kill. Primitive bow takes 4 or 5 arrows. Instead if grinding narcotic, hunt down this and harvest their bodies. They give you something called bio toxin which is used as a narcotic. Cant make arrows out of it, but its surprisingly BETTER than normal narcotics
While they are dangerous they are the greatest source of narcotics in the game. They give what’s called bio toxin and this will make torpor rise faster. If you want to kill them safely lure them to a raft and then crossbow them down. They are fairly weak so you won’t need many shots to slay them. Your greatest worry will be the sharks but if you can kite them into these guys you will find it works to your benefit.