Poseidon is the name given to the god of seas and oceans, according to Greek mythology; also known as the god Neptune, in Roman mythology.
The mythological figure of Poseidon is said to be a strong and imposing man, being considered one of the most powerful and important gods in Greek mythology, as well as Zeus and Hades.
Poseidon is the son of Cronus (god of weather) and Rhea (goddess of fertility), parents of all the major gods of Mount Olympus. That is, Poseidon is brother of Zeus (god of gods) and Hades (god of the underworld, of the dead).
Poseidon's image was described as a muscular man with a long beard, always holding a trident and accompanied by a dolphin or a giant seahorse.
Poseidon was adored mainly by fishermen and travelers, who asked for protection at sea. Sailors pleaded for calm, storm-free waters. However, Poseidon was known for his fickleness and instability. When the god of the seas was angry, he would take out his anger by creating huge sea storms, earthquakes, tsunamis and other catastrophes.
Poseidon was married to the sea nymph (nereid) Amphitrite, however, like his brother Zeus, Poseidon also had numerous mistresses. In total, the god of the seas had several children, including the giant Orion, the Cyclops Polyphemus and the winged horse Pegasus.
One of Poseidon's most famous lovers was Demeter, his sister. Demeter changed into a mare to try not to be found, but Poseidon, in the form of a huge stallion, ended up impregnating his own sister. From the union was born Arion, a charming and mighty horse.
See also the meanings of Zeus and Jellyfish.