Splashing Fish

The Splashing Fish is an easter egg that whenever the player splashes water, there is a 1/256 chance of a fish splashing out of water.

Prototype Splashing Fish
There is an object in Whomp's Fortress that checks the water level that appears to be a relic of an original, prototype version of this easter egg. The only code left in the object is code to check the water level. The rest of the code is stubbed out, but it is believed that when the water splashed, and the water level was checked and a splash was detected, it would spawn a fish. However, this original function takes up an object slot, and when the developers realized a 1/256 chance would remove the need for this object, this was removed.