Splash-Submerge
In a movement reminiscent of breaching in whales, an elephant draws its head and chest up out of the water into a vertical position (as if sitting), and then, while raising the trunk over the head and leaning back, allows the body to splash backwards or sideways into the water and submerges such that the head and/or entire body is completely below the surface of an area of water.
References: Poole & Granli 2021. (Full reference list)
This behavior occurs in the following context(s): Lone & Object Play, Social Play