Appearance

Sunken skeletons are an underwater variant of the skeleton. They look similar to the Mossy Skeleton from Jungle Awakens with the green patches of algae on its head and upper ribcage resembling vines and plants. On the right side of its face is a long patch of purple coral growing out of its eye, and on its legs and chest are smaller patches of purple coral growing on the bone. unlike their land-based counterparts, they have crossbows rather than bows.

https://minecraft.fandom.com/wiki/Minecraft_Dungeons:Sunken_Skeleton