Danionella dracula

Differs from its congeners, Danionella translucida and Danionella mirifica, in having the following characters: a single bone in the upper jaw (versus two); a single row of 6-13 odontoid processes in males on the dorsal surface of the dentary and on the ventral surface of the upper jaw, the anteriormost processes of which are large and canine-like (versus absence of processes); absence of maxillary-mandibular cartilage (versus presence); the possession of 7C8, 8C7 or 8C8 principal caudal fin rays (versus 9C9), dorsal procurrent rays 3-4 (versus 5-6) and ventral procurrent rays 2-3 (versus 4-6) (Ref. 81221). Description: dorsal-fin rays ii, 4-5, i? anal-fin rays ii, 9-11, i? pectoral-fin rays i, 4, ii; and pelvic-fin rays i, 3, ii in females and i, 4, i in males (Ref. 81221).