What animal adaption would be the best for surviving in the open ocean?

Gills and webbed limbs. If they are amphibious, then I would say webbed feet and webbed arms.

Explanation:

Learned this in my freshman Biology class thanks to the Ameoba sisters...heh;-;

Camouflage

Explanation:

Some animals can blend in with their other surroundings. They use camouflage when a predator is coming close.

phaneritic textures in which phaner means visible so phaneritic textures are standard of impertinent volcanic rocks. these rocks crystallized gradually under the surface of earth. when the magma cools deliberately then the ores have chance to develop and produce long crystals.