Guardian

The Unknown Hostile Underwater Mob is a mob that Jeb is working on. It will be hostile and will only spawn underwater. It will not be a shark or a barracuda.

The new hostile mob will spawn in water dungeons containing prismarine and sea lantern.

It will be a rather "nasty" mob. Its health, attack strength, drops, model and name are all unknown.

The mob will have a ranged attack and will be hostile to squid as well as the player. A full set of diamond armor, potion of water breathing and respiration enchantment is recommended on hard mode.