When a bunch of sea pickles are placed next to each other (in different blocks, not stacked in one block) in one block deep water, the texture of some of the water blocks changes to the texture of the sea pickle.

The steps to reproduce are simple; just make a wide, one block deep pool of water, then start placing sea pickles on every block. Some of the blocks will start to display the sea pickle's two-dimensional texture instead of the water texture.

Attached are photos from two different worlds. One is from a survival world that was created a few months ago, and two are from a brand new world that was created to test out this bug.