Sea-dwelling giants with blue skin and webbed extremities

Sea Giants stand on average 17 feet tall, and have sea-blue skin, hair resembling seaweed, and webbed fingers and toes, making it both harder for them to walk on land and restricting their manual dexterity. They wear clothing made of seaweed and other things that grow under the sea, but usually when prepared to fight will wear armor made of giant crab shells and other hard carapace sea creatures. Generally they are neutral, and largely uncaring about the smaller races, but consider themselves deadly enemies of cloud and fire giants, often allying with frost and stone giants to fight them. Sea giants, as one might expect, live in large bodies of water, usually the sea or oceans, though occasionally very deep lakes. They gather treasure from shipwrecks for their hoard, and have been known to make deals with the smaller races, using some of their treasure to trade for items they cannot scavenge from the sea. They are capable of breathing both air and water, and like other giants use hurled boulders as missile weapons if available.