After I was done hunting I had to cross a river to return home and these guys killed my favorite dilo and it was over for my tame :(

Easy bio toxin: Just find one near the shore, aggro it and swim to the shore, making shore its following you. Once your on the shore wait for jellyfish to be on the edge of shore and just stab it with your spear / pike. You get like 20 - 30 bio toxin, but 1 spoils in about 40 minutes. I find it really useful to just go harvest bio toxin than use narcotics to keep a tamping Dino asleep, so you can use all your narcotics on tranq arrows or tranq darts. Oh and finally once you reach a high enough level (I think around level 90) you can learn the shock dart which uses the bio toxins, and 1 - 3 shots most Dinos.

These things drop bio toxin the best tranquilizer

Pretty easy source of narcotic, bait them and kill it with pike so don’t narcotic

You can lure them to shore by standing a little ways in the water (deep enough that they start to drift towards you) and when they're close, back out and shoot/stab them. This way you can harvest biotoxins without getting yourself or tames killed from their shock attack.

NATURAL SPEEDBUMPS FOR ALL THE OCEANS.

Turrets and Plant X will NOT shoot at them so be careful, best way to kill them is with a crossbow.

This app states that this jelly is found in the “Deepest depths of the ocean,” except I just found three right off the coast of The Footpaw lol. ^^

Description is way off!

It is a big jellyfish found everywhere that will do what it can to mek your life miserable or end.

They are quite OP, but not very fast, but once you get close to them, you can’t get out, especially if there are more than one

U should have a harpoon if u want to kill it

these guys are the best to kill if u want to get biotoxen

I am killing these guys for bio toxin an unknowingly I went near them then they attacked me my dinos were in neutral they went to attack these blue blood electric jellies I ran away I turned and saw that those electric shocke were killing my turtle and Para but whistled so they ran to me.I got angry on those jellies and killed those friends jellies.

And #1 reason why I had to tame a basilosaurus asap. My sea pickle kills these and gathers so much toxin for me to make mroe toxic arrows. Gonna take another basilosaurus cuz they are cute and OP

Cnidaria is a very powerful threat, Melee is impossible, Killing it is possible with ranged attacks, Velonsaur Darts, Any firearm, And The Wyvern Breath Attacks, And if you do choose to flee they are quite fast, Against a player with out Oxygen pumped they need to be quick to swim away. On a dino that swims fast they can be easy to bump into, So watch Out

Whenevere I see these guys I do a giga chad move,lute them and kill em with my sword I will avenge my old tames who have died to it and many more soldiers who has bad their tames killed my these monsters,I will them with ease and avenge me and you all people never give up and to kill these,you can't kill them with a:raptor strategy:get a little close to them and lure them into the most far place they can go into the land,n.2:kill them with your ranged attack(note they have bad range) this works better with a trike and Carno and many more big dinos like gigas and rexes,idk if I made your day better or worst but let me know by clicking the arrow pointing the sky mboby thingy,but if it made you dinos die click the downy button note again:I have lost 8 dinos/tames to this monster and I'm gonna avenge their deaths and yours.

Don’t go near these creatures just shoot them.

This thing killed my turtle named Michael Angelo

Ich can one tap these and make their drops better

A level 30 Cnidaria just killed me and my beelzebufo and I llost all of my armor and guns so from now on I am gonna kill all of these jerks on sight.