Nomorhamphus rossi Meisner, 2001

Family:  Zenarchopteridae (Internally fertilized halfbeaks)
Max. size:  4.66 cm SL (male/unsexed); 10.01 cm SL (female)
Environment:  pelagic; freshwater
Distribution:  Asia: Philippines.
Diagnosis:  Dorsal soft rays (total): 10-12; Anal soft rays: 14-17; Vertebrae: 39-41. This species is distinguished by the following characters: the second anal-fin ray in males in which segment five is greatly elongate, comprising one half of the ray; spiculus is thick, unsegmented distally; it is offset dorsally at about one fourth its length, with distal tip pointed ventrally (Ref. 44897).
IUCN Red List Status: Endangered (EN); Date assessed: 27 March 2020 (B1ab(iii)) Ref. (130435)
Threat to humans:  harmless

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