Recovery Heart

From Zelda Wiki.org

Recovery Hearts aid Link by replenishing his life energy by one heart at a time. They can be found anywhere in Hyrule, and are uncovered in pots and jars, tall grass, defeated enemies, and under rocks. They appear as small, floating, red hearts.

One humorous moment in Twilight Princess occurs when Link defeats the boss of the Snowpeak Ruins, Blizzeta, who is actually Yeta, the wife of Yeto. After she is restored, Yeto rushes to Yeta's side and the pair share a romantic moment. At this point, forty recovery hearts burst from the pair, as well as a Heart Container for Link.