However, Poseidon was determined. So he sent his messenger Delphinus, the king of the dolphins, to locate the mermaid and win her heart.
The dolphin king obeyed and started a long, perilous journey to find the love of his master. When he finally located the maid, he promissed her that, if she married Poseidon, all the energies of Poseidon would balance and tranquility would come to the world of waters. No strong sea would ever do harm to the seamen again.
Touched with emotion, Amphitrite surrendered and she married Poseidon. According to Apollodorus, the couple gave birth to two daughters, the Nymphs Rhode and Benthesicyme, and a son, the merman Triton, with the upper body of a human and the tail of a fish.