Kalyptatherina helodes (Ivantsoff & Allen, 1984)
Marine sailfin silverside
Kalyptatherina helodes
photo by Hadiaty, R.K.

Family:  Telmatherinidae (Sailfin silversides)
Max. size:  4.5 cm TL (male/unsexed)
Environment:  pelagic-neritic; brackish; marine; depth range 0 - 1 m, non-migratory
Distribution:  Western Central Pacific: known only from Misool and Bantana Islands north west of Irian Jaya, Indonesia.
Diagnosis:  Dorsal spines (total): 3-5; Dorsal soft rays (total): 6-9; Anal spines: 1-1; Anal soft rays: 11-14. Second dorsal fin lacking spine. Description: Characterized by semi-translucent pale yellowish body with blue iris; silvery cheek patch; fins clear to slightly yellowish; male with fine yellow tip on upper caudal fin lobe; longitudinal scale series 28-30; head 3.2-3.5 in SL; eye 2.5-2.9 in head length; greatest depth of body 3.8-4.5 in SL (Ref. 90102).
Biology:  Inhabit mangrove swamps close inshore. Nothing is known of its biology. This species is too small to be of any commercial value but may be taken as food by young of commercial fish species (Ref. 9836).
IUCN Red List Status: Least Concern (LC); Date assessed: 04 December 2019 Ref. (130435)
Threat to humans:  harmless


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