Talk:Sea Dragon Leviathan/@comment-25896371-20160926132136/@comment-174.31.26.167-20160928190918

Potassium, Sodium, rubidium, and a couple other elements are known to react violently with water, ripping the oxygen off to burn, and leaving the hydrogen to float away.

If there's enough air nearby, a small amount of water on rubidium in particular will produce enough heat to ignite the resulting hydrogen, causing even more fireworks.

Fire underwater is nothing new.