Amphitrite both the Nereids "and" the Oceanids. Others called her the personification of the sea itself (saltwater). Amphitrite's offspring included seals and dolphins. Poseidon and Amphitrite had a son, Triton who was a merman, and a daughter, Rhodos (if this Rhodos was not actually fathered by Poseidon on Halia or was not the daughter of Asopus as others claim). "Bibliotheca" (3.15.4) also mentions a daughter of Poseidon and Amphitrite named Benthesikyme. Amphitrite is not fully personified in the Homeric epics: "out on the open sea, in Amphitrite's breakers" ("Odyssey" iii.101), "moaning Amphitrite" nourishes fishes "in numbers past all counting" ("Odyssey" xii.119).
Poseidon son, the Cyclops Polyphemus, resulting in Poseidon punishing him with storms, the complete loss of his ship and companions, and a ten-year delay. Poseidon is also the subject of a Homeric hymn. In Plato's "Timaeus" and "Critias", the island of Atlantis was Poseidon's domain. The earliest attested occurrence of the name, written in Linear B, is "Po-se-da-o" or "Po-se-da-wo-ne", which correspond to ("Poseidaōn") and ("Poseidawonos") in Mycenean Greek; in Homeric Greek it appears as ("Poseidaōn"); in Aeolic as ("Poteidaōn"); and in Doric as ("Poteidan"), ("Poteidaōn"), and ("Poteidas"). The form ("Poteidawon") appears in Corinth. A common epithet of Poseidon is "Enosichthon",