jellyfish
the eel because the eel would sting it before the lobster could strike at it.
It would depend on the species of shark. If it was a baby shark that only ate small crabs and shrimps, the eel. If it was a great white shark then the shark.
Electric Eel would win it could shock the pirhana to death
The shark would eat the fish, and then the electric eel and the jellyfish would hurt each, other unless it was a man 'o' war or box jellyfish, then it would just kill the eel, and then the shark could eat it too, and most jellyfish can't but the box and man o war if they stung it enough could kill a shark.
The whale would win because it can just eat the box jellyfish. The box jellyfish's toxic is too small to damage the whale a little bit.
the shark would win unless its a large jelly species.
A lion would win the fight because 1.) it is bigger, 2.) It is stronger, and 3.) the lion has claws. Although the jellyfish can sting, the lion, as I said, is stronger. But, if the battle takes place in water, there is a chance that the jellyfish would win the battle because it has a home-court advantage.
The sea snake - since it has very powerful venom !
The lion fish's spines contain a toxin which can kill fish however they primarily use this as a defensive mechanism. Conversely, the electric eel specifically uses it's shock cells primarily as an offensive weapon to stun fish.
The box jellyfish since it has stronger and more powerful toxic than the portuguese man of war.
man of war all day
Jelly fish because they have a lot of tentacles that can sting.