Alien Containment (Subnautica)

The Water Park is a large, circular aquarium which can house fauna acquired by the player. It is built from the Builder inside of rooms.

In order to get inside of or put fish into the Water Park, the player must build a hatch on the side. The player can then enter the Water Park and release caught fish into it.

If you leave two creatures inside the Water Park for long enough, they will breed and another fish of the same species will spawn inside.