Ctenophores

Ctenophores are see-through, gelatinous creatures that live in the deep sea and withstand crushing water pressures. And yet, on land so-called comb jellies quickly melt away and dissolve. Researchers collected ctenophores from a range of sea depths from around the world. They analyzed the various body tissues of the creatures and found that the deeper a ctenophore lived, the higher its level of PPE, short for plasmenyl phosphatidylethanolamine, a type of cone-shaped phospholipid, or fatty molecule, found in cell membranes.