Tbh, all you need to do to kill these is lure them as close to shore as you can and attack with a spear. I’d say maybe 1/30 even hit me when I attack like this, so it’s really safe. Just don’t be underwater for long around them. They look like they are moving slowly, but then suddenly you are being attacked by 4 of them.
WORST THING IN THE GAME!!!!!! They will stun your tame and kill it, regardless of the level. Only the basilasaurus is safe. If they sneak up on you with your mosasuar, they will kill you and the mosasaur
All you need to do is swim above it and far enough away we’re you can’t get stung. Then just pull out your sword and swing while swimming backwards. They hardly have any health and you will take them out in a few swings with a pretty solid sword. Just make sure you don’t get close or you will die!
Harvesting bio toxion (normal version and mobile):
Normal- get on a water tame and swim by them, avoid being stung as escape is impossible, kite them to the shores, get of your tame and start poking them.
Mobile- in mobile they act like idiots and bob closer to the shore each day, just fly about on a pteranodon until you see some close to the shore, then get poking.
Use the ichthy they said... it's immune to shocks they said... that's fine I'll quickly swim done with no scuba gear and lure one to the surface...zap... surface is so near yet so far... manta finish the job
While your tame still might die anyway if you have a high hp dino that gets zapped by these whistle followall and swim away. If you can i managed to rescue my 140 rex that way. She had 8k health and lost around half with a normal saddle. I came back with my re and killed them with rock throw. (It was super effective)