Oocyclus shorti 

　　Oocyclus shorti is another newly discovered aquatic beetle belonging to the family Hydrophilidae. It primarily inhabits the wet rock surfaces in regions such as Guangdong, Guangxi, and Hong Kong in China. These beetles are about 3.6 to 4.0 millimeters long, oval-shaped, and strongly convex. Their backs are black, and their heads and pronotums often have a faint greenish sheen. They typically coexist with Cymbiodyta orientalis in the same areas.