This dog-like aquatic mamal is in posession of hydrokenetic powers including the ability to part large bodies of water, create 50 ft. tall waves and spray water from its mouth with the same pressure as a high-powered water cannon. They also possess near human intelligence and can remember past attackers and learn from each others experience. At the same time these beasts are generally non-aggressive towards humanoid (as in human-like form, not as in goblinoid) creatures. So the question is this, how would you attempt to translate this creature into B/X D&D or other old school roleplaying game terms and what name would you give it?