Ym, from the Canaanite word Yam, meaning "Sea," is one name of the Ugaritic god of Rivers and Sea. Also titled Judge Nahar ("Judge River"), he is also one of the Elohim or sons of El, the name given to the Levantine pantheon. Others dispute the existence of the alternative names, claiming it is a mistranslation of a damaged tablet. Despite linguistic overlap, theologically this god is not a part of the later subregional monotheistic theology, but rather is part of a broader and archaic Levantine polytheism.
Ym is the deity of the primordial chaos and represents the power of the sea, untamed and raging; he is seen as ruling storms and the disasters they wreak. The gods cast out Ym from the heavenly mountain Sappan. The seven-headed dragon Lotan is associated closely with him and the serpent is frequently used to describe him.
Of all the gods, despite being the champion of El, Ym holds special hostility against Baal Hadad, son of Dagon. Ym is a deity of the sea and his palace is in the abyss associated with the depths, or Biblical tehwom, of the oceans. (This is not to be confused with the abode of Mot, the ruler of the netherworlds.) In Ugaritic texts, Ym's special enemy Hadad is also known as the "king of heaven" and the "first born son" of El, whom ancient Greeks identified with their god Cronus, just as Baal was identified with Zeus, Yam with Poseidon and Mot with Hades. Ym wished to become the Lord god in his place. In turns the two beings kill each other, yet Hadad is resurrected and Ym also returns. Some authors have suggested that these tales reflect the experience of seasonal cycles in the Levant.
Ym has created a Domain at Kiba Storage in the Tokyo - Bay Area. Frozen Tuna is obtained with his defeat.
Shin Megami Tensei IV Apocalypse
Ym can be found in Camp Ichigaya or Tiamat can evolve into Ym when she reaches level 60, provided that Nanashi is strong enough to control the result. Ym can teach Nanashi the Mabufudyne, Concentrate, Sea of Chaos and Energy Drain skills through his Demon Whisper. He benefits from learning Ice and support skills.
Devil Survivor 2
"A dragon that appears in ancient Semitic lore of the Palestinian region. He is enemies with Baal, the god of fertility and agriculture. He gains his powers by dwelling underwater and ruling the seas and rivers, where he causes floods. Baal defeated him, but since there are similarities to Tiamat's death at Marduk's hands in Babylonian lore, some believe that Ym and Tiamat are the same being."