Sea in culture sea nymphs whose parents were Nereus and Doris. The Tritons, sons of Poseidon, who were variously represented with the tails of fish or seahorses, formed Poseidon's retinue along with the Nereids. The mythic sea was further peopled by dangerous sea monsters such as Scylla. Poseidon himself had something of the shifting character of the sea, presiding not only over the sea, but also earthquakes, storms and horses. Neptune occupied a similar position in Roman mythology. Another Greek sea-god, Proteus, specifically embodies the domain of sea change, the adjectival form "protean" meaning mutable, able to assume many forms. Shakespeare makes use
Trident of Poseidon horse for mankind, while his rival Athena produces an olive tree. The oldest coins of Poseidonia from the 6th century BC depict trident wielded by Poseidon in his right hand, similar to Zeus's thunderbolt. An Attic red figure kylix from depicts Poseidon killing the Giant Polybotes with his trident. In another myth, Poseidon creates a spring or springs with the strike of his trident to reward Amymone for her encounter with him. In a version of another myth Poseidon wields his trident to scare off a satyr who tries to rape Amymone after she mistakenly hits him with a hunting