Triton

Triton, in Greek mythology, trumpeter of the deep, the son of Poseidon, god of the sea, and of his wife Amphitrite. He lived with his parents in a golden palace in the depths of the sea, but sometimes went to the coast of Libya, where he once came to the aid of the Argonauts in their quest for the Golden Fleece. Human in form to the waist, but with the tail of a fish, Triton blew loudly upon his large seashell to raise great storms and blew gently to calm the waves. In later legends, the attendants of the water deities were known as Tritons, and they had a similar appearance.