This small shrimp hide allows you add a fast and easy hiding spot for nano shrimp like cherry shrimp, neocaridina, and more. It helps protect shrimp from large fish. You can also add the hide to any tank and allow your shrimp to have more space to explore. This smaller design is prefect for tanks that a 5 gallons to 20 gallons. You can also add the hide to the sides of your aquarium if you just want a new space for them without taking away from your aquascape. To encourage shrimp to explore the shrimp cave, add some shrimp pellets to your hide inside the shrimp tank. This will encourage them to explore the new hide. We also have larger aquarium underground tunnel, for larger shrimp. We even have fish tunnel for aquarium.