Sarcohyla crassa is a species of frog in the family Hylidae. It is endemic to Oaxaca, Mexico. It is also known as the aquatic treefrog, or when referring to the former Hyla bogertae, Bogert's aquatic treefrog.
Sarcohyla crassa occurs in streams in montane cloud forest at elevations of 1,540–2,650 m (5,050–8,690 ft) above sea level. It is threatened by the loss of original montane forests and possibly chytridiomycosis.
