I suppose they die because oil is very toxic, especially for sea animals that drink that water, make sex in that water, and poo in that water.
Sorry for the sex part... I LOVE SEX!
Well, the same thing that happens every where else. A general natural break down in the area in which all the surrounding wildlife would be affected.
If there was a oil spill the entire ocean ecosystem would be at risk.
youd kill it
Water would diffuse into the cells of the jellyfish, causing it to bloat up and possibly burst.
You will burn yourself and it will hurt
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You'd probably get stung.
It would lose salt into the water.
It's simple. They would die.
oil would fill the lands
It depends. If you swallowed a Portuguese man of war, you would be dead.
The organelles would spill everywhere and it would die