His first appearance was in the Golden Age comic Venus #12, February, 1951. Neptune is the god of the sea and he is Zeus's older brother, Zeus is probably the only Olympian god who is more powerful than Neptune. Neptune rules the seas and he is Hercules's uncle. He was the son of Kronos and Rhea. He was usually represented as carrying a trident and accompanied by dolphins. His carriage was a huge shell, drawn by horses or sea-horses, his weapon was a trident that had powers that allowed him to manipulate the water and control the water and it controlled all sea animals.

Powers
Neptune's powers are only rivaled by one Olympian God which is Zeus. Neptune has superhuman strenght equal to that of Zeus, he has superspeed, godlike agility and stamina which makes him tireless, he has a great resistance to physical resistance probably greater than Hercules's and he has invulnerability to many physical attacks and he does not get harmed by conventional weapons. He can control, create and manipulate water such as making an entire ocean into a puddle or creating tsunamis, he can manipulate energy and blast water and energy blasts, he has divine powers which allow him to resurrect the dead. He can create powerful electrical fields, he can create force fields powerful enough to protect him from Zeus's attacks. He has the power of flight, he can breathe under water for eternity, he can breathe oxygen as well and he is the greatest swimmer in the earth. He can create and blast mystical bolts or he can generate blasts powerful enough to be at a planet destroying level. Neptune is nearly omnipotent like Odin and Zeus. He also has the power of weather control, light absorption, electric disruption and astral projection, he can control some of the cosmic energies in the universe, he can control fire and he can withstand high temperatures up to the core of a star 10 million times the size of our sun and temperatures below absolute zero.

Weapons
Neptune carries a trident that controls the waters of the Earth and it can fire energy and electrical bolts, it allows him to create tides etc., it can create force fields and manipulate energy, it is made from gold and adamentium, which makes it extremely hard and it is virtually unbreakable.