Marsh

The  is a Terrain introduced in the 12.0.0 update.

Appearance
It appears as a 3D block with grass on the top along with 3 daisies. In the middle, there is dirt and on the bottom, there is water (possibly).

Use
It is used to increase the chance of pets hatching.

Trivia

 * This terrain's block model doesn't have to do anything with Minecraft blocks.