Iso natalensis Regan, 1919
Surf sprite
Iso natalensis
photo by SFSA

Family:  Isonidae (Isonids)
Max. size:  8 cm TL (male/unsexed)
Environment:  pelagic-neritic; marine
Distribution:  Indian Ocean: widely distributed, extending to Cape Agulhas, South Africa.
Diagnosis:  Dorsal spines (total): 4-7; Dorsal soft rays (total): 12-17; Anal spines: 1-1; Anal soft rays: 21-28. Translucent with silver lower head and band along side to silver spot on caudal peduncle and viscera enclosed in silver. Description: Characterized further by having longitudinal scale series 40-60; depth of body 3.3-3.4 in SL; head 4.2-5.5 in SL; eye 2.5-3.6 in head length (Ref. 90102).
Biology:  Found in large numbers in boiling surf, close to shoreline. Occurs in large aggregations (Ref. 90102).
IUCN Red List Status: Not Evaluated (N.E.) Ref. (130435)
Threat to humans:  harmless


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