Amolops torrentis, commonly known as the torrent sucker frog or the little torrent frog is a species of frog in the family Ranidae and genus Amolops that is endemic to China, specifically only on the island of Hainan. They are most likely to be found in streams and surrounding wetland areas. Males have high-pitched mating calls, which are favored by females. Glands on this species' skin can secrete toxins. This species suffers from parasitism and habitat loss. Currently it is listed as vulnerable by the IUCN and is protected by law in China. Taxonomy A. torrentis is within the A. hainanensis group. It is a sister taxa to both A. hainanensis and A. daiyunnensis. Description A. torrentis contains multiple characteristics that distinguish it from other members of the Amolops genus that also exist in China and southeast Asia. One of these differentiating characteristics is that A. torrentis has tarsal glands. A. torrentis also has a distinct tympanum edge and a tibio-tarsal articulation reaching beyond the snout when the back limbs are adpressed. Individuals of this species also have a distinct glandular ridge (also known as a dorsolateral fold of skin) under the tarsus and smooth bumps on the back, along with a circummarginal groove at the tip of the first finger. Males of the species also possess a pair of subgular vocal sacs that are of white color. A. torrentis has sexual size dimorphism, with females of the species tending to be larger than males of the species (adult females have snout-ventral lengths of less than 42 mm, while adult males have snout-ventral lengths of less than 35 mm). The tadpoles of the species grow up to 35 mm in length. The tadpoles have a divided upper jaw sheath with 5/3 labial tooth rows. The tadpoles also have ventral glands. Distribution and habitat A. torrentis has only been found on Hainan island in China, in locations that range from 80 to 1000 meters in elevation. For example, A. torrentis has been found in the Limushan nature reserve on Hainan island. While its presence has been reported in the Guangdong province of mainland China, these sightings have been disproven. The frogs observed in Guangdong have since been reclassified into a different but related Amolops species. A. torrentis lives in medium and large streams as well as the surrounding wetland area. They are called torrent frogs because of their proximity to fast-flowing