Adelotremus leptus is a species of combtooth blenny native to the Red Sea where it is only known from Marsa el At, Egypt. It was caught at a depth of . It has a slender body. The first specimen, a female, measured SL, and others have been recorded since. Until 2017 this species was considered to be the only species in the monotypic genus Adelotremus.Smith-Vaniz, W.F. & Rose, J.M. (2012): Adelotremus leptus, a new genus and species of sabertooth blenny from the Red Sea (Teleostei: Blenniidae: Nemophini). Zootaxa,3249: 39–46. In 2017 a second species, Adelotremus deloachi was described from Indonesia.
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