Hi Guys!!! Sunken Skeletons are a new hostile mob and skeleton variant that appeared in the Hidden Depths DLC for Minecraft Dungeons.

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. They have an armored variant.

Behavior:

Like their land-based counterparts, they attack the player via ranged with a Crossbow with the unique ability being it fires harpoons instead of arrows, allowing for smoother water movement.

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