There are at least 13 species of fish living in Gaomei Wetlands, including the spotted catfish, tiger bass, grass puffer, and 4 species of mudskippers from 3 genera. In order to adapt to the tidal environment, fish living in wetlands generally have mechanisms to assist respiration. For instance, mudskippers and grass puffers are able to breathe through their skin. The skins of these fish are mostly slimy and scale-less but are unable to prevent water loss. Therefore, these fish often have to roll in the water to maintain moisture in their skin.