Skeleton Horse
They despawn very quickly though. Unlike regular horses, they will not kick the player off if they go more than 2 blocks underwater but will sink instead. Skeleton horses will not drown.
Can skeleton horses go under water?
Unlike normal horses, a skeleton horse does not force the player to dismount when it enters water deeper than two blocks; rather, it can be ridden underwater without drowning. The player can still drown underwater without the proper potions or enchantments, even when mounted on the skeleton horse.
Can you revive a skeleton horse?
Players can only restore the health of the skeleton horse. They can throw down potions on skeleton horses to regenerate their health. Skeleton horses can also have their health restored by using a splash potion in Minecraft. Players can create potions at a brewing stand.