U can’t knock it out

Hide ur friends and family

These things dismounted me off of my 261 mosasaur and then killed me. I tried to go back and whistle the moss but it was stunned and couldn't move so it died instead.

They should add a notification to if one is near so ark says: run or you'll find yourself at the stone age again

They drop a pretty neat resource called 'Bio Toxin' when killed. It can be use as a steonger alternative to the Narcotic. It can also be used for a new 'Shocking Tranq Dart' which can shock the target and add a substantial amount of torpor. Perfect for knocking out Quetzal's.

These guys utility is biotoxin which is useful for keeping creatures unconscious

In early game they are the must annoying water creature ever, to kill them you need to bring them to the nearest point from beach land then kill them with arrows and if melee weapon so be fair as possible to be save from these annoyers

These f!ckers killed ma spino and I destroyed em with a king titan

To kill these guys, make them follow you to a shore and poke at them with a metal pike from where they can’t reach you.

Ok, so I was once taking a swim while my tames were near the shore and when I look to my right, these guys showed up and I swam for my life but the shocked me so when I took my spear out and hit one of them my tamed came over and started to attack these jellyfish...

I lost my Scorpion, Parasaur, and Sacro. :(

R.I.P. Scorpio, Lilly, and Snapper...

If you need the bio toxin but don't have underwater tames, just use a crossbow and normal arrows and it will die pretty quick. DONT ATTACK WITH A CLOSE RANGE WEAPON!!! harvest with hatchet to get the most bio toxin.

Use the basilosaur, it’s not affected by the jellyfish it’s ability

Why are you even here? They are untamable1!2!2!2!1!1!!1!1!1!1!

Bro was like weeping angels being able to yeet you off your tame unto the other side of the map. I was riding my mosasaur with a structure on its platform saddle just cruising my way to the base until one of this suckers bump my tame, then goes up up and away then died from falling.

A great way to kill these early on is to chuck spears at them from the shore

Do not get in the water with a tame without wiping these things out to extinction. They move silently and stun you and your creature so you can't move or fight back. Typically you can just stand on the edge of the beach, they will come for you, you can hop out of the water when they're close and then just whack them

Once I saw this thing in the water and I was like “ oOh I Didn’T KnOw TherE WeRe TreASure chEstS In tHIs gaMe “ and just ran like Usain bolt into them. I’d say it was more insane Bolt. And Bolted to the spot was I! Yep, my discovery of the Cnidaria!

Ark has a kill 250 dodo quest on mobile… why don’t they have one for these demons? One Like=one person who wants there to be a kill 1,000 Cnidaria quest. Also they killed my first turtle my sarco and almost my spino I have been gathering amber to revive my sarco.

It sits there like an eerie ghost. Waiting. Waiting. and waiting...

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

I'm fairly New to ark and I was breeding Rex's on herbivore island and wanted to bring them to the main land but I didn't have a big boat able to carry the Rex's so I decided to take a swim there Rex's I thought there invincible I thought I was wrong

Rip omega bravo punisher and Becky 😭😭😭😭😭