Don't recommend swimming close unless you have a Basilasaurus, lost my favorite itchyasaurus, her name was flipper , but I learned if you ride a raft, you can get close and stab with spear, easy removal of killer jellyfish.

I found an invincible one:( :( :(

I rode my 138 Sarco into the sea collecting oil at sea, finished an oil rock, turned around and saw 5 of these bastards ganging up on him while he was sleeping . We both died, take these on by range with crossbows.

F in the chat for my lv 138 “Big Boy Gator”

If you sea glowing in the sea do not go to it

Me goes to glowing

Fieind do not go

Me goes anyway

Me dies a slow and shocking death

Do these things look harmless to you? If you said yes YOU COULD NEVER BE SO WRONG

I will kill them from distance with a crossbow,to kill these you have to aim up on these and aslo these guys has so much less health they will die before they even approach you,but if u didn't see these then that is tha last moment for u or your tame. I hope this is usefull

Was trying to take care of an alpha Megalodon that kept attacking anything that set foot in the water near my base. As soon as I went in with my Sarco that I had literally built for killing this thing, 5 of these pulled up and ended it instantly. DEATH TO ALL JELLIES

can NOT be killed by therizno.

Killed my beloved sarco Crocodile Dan whil i was getting oil, very fast silent untill they have yiu trapped

says it’s early game? I heavily disagree with that and they might kill a giga given the right circumstances

Ubfoot so can see..

I get water and fill my waterskin next 3 surround me and kill me and all my assisting Dinos :(

BASILOSAURS ARE IMMUNE TO THESE MF STING ATKS AND DISMOUNTS,UP SO THE NOOBS CAN SEE

On ARK: Mobile, these guys can spawn at beaches, or at the ocean floor. On ARK: Ultimate Mobile Edition, these guys can spawn literally at any depth in the ocean.

Cnidaria have a very large aggro range. They can't move very fast but you'd be surprised how've often they'll appear right behind you while you're in your inventory. Without a basilo, I kill them with my crossbow. NEVER look at a group of jellies and think, "Eh, they're far away enough. I can get into my inventory"

Lure them to near the surface and kill them from land.

Most annoying aquatic creature.

BROOO I WAS USING AGRY TO KILL THESE AND ONE WENT IN THE AIR AND HIT MY AGRY

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.

Bary? Avoid.

Megaloshark? Avoid.

Spino? Ehh, he can nip at them but I wouldn't risk my buddy.

Basil? OH, IT'S GO TIME BABY.

These dumb gelatinous orbs killed: my sarco Rip daverwaver, my 125 Baryonyx Rip Bary the 1st, my Meg Rip Megan, and my pelagornis! Rip pelvis, please do kill these things on sight with a crossbow! For Valhalla and our dead mounts!