Good for breeding shrimp Provides hiding shelter Natural appearance This half dome cave is the perfect size shelter for shrimp to evade fish and to feel safe. They enjoy crawling in and out of the holes, and it provides an excellent place for them to breed so the baby shrimp don't get eaten by larger species.  The cave itself is made out of terra cotta clay and will not harm livestock. Moss or other plants can be placed on or around the outside of the cave to mimic the natural environment for shrimp. We recommend exercising caution with this product with fish such as bettas because they can try to fit into the small holes and could become stuck. Don't mix with fish where that could pose a problem. Most all other community fish would be fine with these shelters.  The shrimp shelter measures 2 in. wide x 1.5 in. tall.