No, the closest would be Shiva with Ice. But the Eidolons in FFXIII aren't really elemental based like they are in many of the past Final Fantasy games.
Teach water magic refine to Leviathan.
i think you can buy it from rin on the airship
No it's just a final fantasy sport :D
Use ye fu**ing water spells
The Oxyale lets you breathe underwater to enter the Underwater Shrine and recover the Water Crystal.
becase the game is broken becase the game is broken
There isn't a spell specifically called Water or a spell that create it in Final Fantasy, though a few enemies can use them, most notably is Chaos' Tsunami (the game treats it as non-elemental though!). The closest you will get is the Blizzard/Blizzara/Blizzaga series of ice spells. You can buy Blizzard in Pravoca, Blizzara in Elfheim and Blizzaga in Gaia.
Most bombs are weak against water or ice so try Water or Blizzaga, also i would suggest using quickenings.
'Tsunami' can be found after you beat Cagnazzo, you will need to backtrack a little, into the water caves you reached the castle using.
Water is not an element
It is The promised land. You can hear this song near the beginning of the movie when they talk about the stuff of life or whatnot.
No water is NOT an "atom". No water is NOT an "element".