It depends on which culture's "god of the sea" you're referring to:
Aztec mythology
Chalchiuhtlicue, goddess of water, lakes, rivers, seas, streams, horizontal waters, storms, and baptism.
Huixtocihuatl, goddess of salt.
Opochtli, god of fishing.
Tlaloques, gods of drops.
Tlaloquetotontli, goddess of the rivers.
Ainu mythology
Repun Kamui, god of the sea
Canaanite mythology
Yam (god), god of rivers and the sea
Celtic mythology
Acionna (Gaulish) - a water goddess/genius loci of the Orleanais region and the Essonne
Boann - goddess of the River Boyne (Irish)
Dylan Eil Ton (Welsh)
Lir (Irish), god of the sea
LlÅ·r (Welsh), god of the sea
Manannán mac Lir (Irish), god of the sea
Nodens, god associated with healing, the sea, hunting and dogs
Sinann (Irish), goddess of the River Shannon
Sequana (Gaulish), goddess of the River Seine
Chinese mythology
Mazu, water goddess and protector of sailors
Ao Kuang/Ao Guang, Dragon King of the East Sea
Ao Qin, Dragon King of the South Sea
Ao Run, Dragon King of the West Sea
Ao Shun, Dragon King of the North Sea
He-Bo/He Bo, God of the Yellow River
Egyptian mythology
Sobek, god of the Nile river, depicted as a crocodile or a man with the head of a crocodile.
Nephthys, goddess of rivers
Fijian mythology
Daucina, god of seafaring
Dakuwaqa, a shark god
Finnish mythology
Ahti, god of the depths and fish
Iku-Turso, a malevolent sea monster
Vedenemo, a goddess of water
Vellamo, the wife of Ahti, goddess of the sea, lakes and storms.
Greek mythology
Aegaeon, god of violent sea storms and ally of the Titans
Amphitrite, sea goddess and consort of Poseidon
Anapos, water god of eastern Sicily
Ceto, goddess of the dangers of the ocean and of sea monsters
Cymopoleia, a daughter of Poseidon and goddess of giant storm waves
Delphin, the leader of the dolphins, Poseidon placed him in the sky as the constellation Delphinus
Doris, goddess of the sea's bounty
Eurybia, goddess of the mastery of the seas
Galene (Γαλήνη), goddess of calm seas
Glaucus, the fisherman's sea god
Hippocampi, the horses of the sea
The Ichthyocentaurs, a pair of centaurine sea-gods with the upper bodies of men, the lower fore-parts of horses, ending in the serpentine tails of fish
Bythos
Aphros
Leucothea, a sea goddess who aided sailors in distress
Nerites, watery consort of Aphrodite and/or beloved of Poseidon
Nereus, the old man of the sea, and the god of the sea's rich bounty of fish
Nymphs
Oceanus, Titan god of the Earth-encircling river Okeanos, the font of all the Earth's fresh-water
Pan, Patron God of fishing
Palaemon, a young sea god who aided sailors in distress
Phorcys, god of the hidden dangers of the deep
Pontus, primeval god of the sea, father of the fish and other sea creatures
Poseidon, king of the sea and lord of the sea gods; also god of rivers, storms, flood and drought, earthquakes, and horses. His Roman equivalent is Neptune.
Potamoi, deities of rivers, fathers of Naiads, brothers of the Oceanids, and as such, the sons of Oceanus and Tethys.
Proteus, a shape-shifting, prophetic old sea god, and the herdsman of Poseidon's seals
Psamathe, goddess of sand beaches
Tethys, wife of Okeanos, and the mother of the rivers (Potamoi), springs, streams, fountains and clouds
Thalassa, primeval spirit of the sea and consort of Pontos
Thaumas, god of the wonders of the sea and father of the Harpies and the rainbow goddess Iris
Thetis, leader of the Nereids who presided over the spawning of marine life in the sea, mother of Achilles
Triton, fish-tailed son and herald of Poseidon
Tritones, fish-tailed spirits in Poseidon's retinue
Achelous, Greek river god
Haitian Vodou
Agwé, a loa who rules over the sea, fish, and aquatic plants, as well as the patron loa of fishermen and sailors
Clermeil, the loa who made rivers flood their banks
Pie, a soldier-loa who lives at the bottoms of lakes and rivers and causes floods
Hawaiian mythology
Kamohoalii, shark god
NÄmaka, sea goddess
Ukupanipo, shark god who controls the amount of fish close enough for the fisherman to catch
Hindu/Vedic mythology
Varuna, the Lord of the oceans
Apam Napat, god of fresh water, such as in rivers and lakes
Ganga goddess of the Ganges River
Varuna (celestial ocean)
Various rivers associated with goddesses in the Rigveda, such as Sarasvati (Sarasvati River) and Yamuna
Incan mythology
Pariacaca, god of water and rainstorms
Paricia, god who sent a flood to kill humans who did not respect him adequately
Inuit mythology
Aipaloovik, an evil sea god associated with death and destruction
Alignak, a lunar deity and god of weather, water, tides, eclipses, and earthquakes
Arnapkapfaaluk, a fearsome sea goddess
Idliragijenget, god of the ocean
Nootaikok, god who presided over icebergs and glaciers
Sedna, goddess of the sea
Japanese mythology
Mizuchi, Japanese dragon and sea god
ÅŒhoyamatsumi, god of mountains, sea and war
Ryūjin or Watatsumi, Japanese dragon and tutelary deity of the sea
Suijin, Shinto god of water
Susanoo, Shinto god of storms and the sea
Lithuanian mythology
Bangpūtys, god of sea and storm
Anusehx, God of the nightime
MÄori mythology
Ikatere, a fish god, the father of all the sea creatures including mermaids
Tangaroa, god of the sea
Mesopotamian mythology
Enbilulu, god of rivers and canals
Enki, god of water and of the River Tigris
Marduk, god associated with water, vegetation, judgment, and magic
Sirsir, god of mariners and boatmen
Nammu, goddess of the primeval sea.
Tiamat, goddess of salt water and chaos, also mother of all gods
Apsu, god of fresh water, father of all other gods
Asherah, Mother goddess whose title is "She Who Walks Upon the Sea".
Norse/Germanic mythology
Ægir, personification of the sea
MÃmir, god of the spring of MÃmisbrunnr, which gives the drinker wisdom and Odin sacrificed an eye to drink from
Rán, sea goddess of love who collects the drowned in a net
Nine Daughters of Ægir, who personify the characteristics of waves
Njord, god of the sea, particularly of seafaring
Nehalennia, goddess of the North Sea
Nerthus, goddess of lakes, springs, holy waters
Nix, water spirits who usually appear in human form
Philippine mythology
Amanikable, ill- tempered god of the sea
Haik, another god of the sea
Amansinaya, god of fishermen
Sirena, mermaid
Siyokoy, merman
Magwayen, goddess of the sea
Lidagat, daughter of Magwayen
Roman mythology
Fontus, god of wells and springs
Neptune, king of the sea
Salacia, Neptune's queen
Tiberinus, the genius of the river Tiber.
Volturnus, god of the waters
Slavic mythology
Bagiennik, water demons who lived in lakes and rivers
Rusalki, female ghosts, water nymphs, succubi or mermaid-like demons that dwell in waterways.
Veles, god of earth, waters, and the underworld
Tonga (Zambezi Valley Zimbabwe)
Nyami Nyami, river god
Yoruba, Orisha worship, IFA
Yemaja, or Yemaya goddess of the ocean, the essence of motherhood, and a protector of children
Mami Wata, a pantheon of water deities
Oshun, deity of rivers, beauty, sensuality. In SanterÃa she also represents wealth
Okie, deity of lakes, daughter of Obatala
Olokun, deity of the oceans often synchronized with Poseidon or Neptune
Igbo, African religion
Idemili, goddess of a river
Uhammiri/ Ogbuide, a lake goddess
Urashi/ Okita, a river god
Ava, a pair of river goddess and god
dios del mar
Poseidon
posiden
the greek god Posiedon is the god of the sea
It depends on which community of Believers you ask. For the Jews it was YHWH or 'Adonai, for Christians, YHWH and, more simply, Father. For Muslims it is Allah, for Polynesians Te Atua. According to Psalms 83:18 God's name is Jehovah.
Thor
adto is the name of the lucayan god
God parted the rivers/sea's 4 times (at the least).
bog
The Roman God of the Sea is Neptune, like the planet
The name of the sea between Europe and Africa is the Mediterranean Sea.
They are both god of the sea because Neptune is the Roman name of Poseidon so they are the both god of the sea.
Posiden
Because, Neptune is the name of the Roman Sea God.
the greek god Posiedon is the god of the sea
Neptune is the Roman god of the sea.
Poseidon Greek god of sea
Poseidon or Neptune got its name by being the god of seas Poseidon and Neptune mean ocean or sea
They are considered the same deity under different names.
Neptune