Chromis yamakawai Iwatsubo & Motomura, 2013
Northern yellow-spotted Chromis
Chromis yamakawai
photo by Motomura, H.

Family:  Pomacentridae (Damselfishes), subfamily: Chrominae
Max. size:  13.08 cm SL (male/unsexed)
Environment:  reef-associated; marine; depth range 2 - 26 m
Distribution:  Western Pacific: Japan and the Philippines.
Diagnosis:  Dorsal spines (total): 13-14; Dorsal soft rays (total): 11-13; Anal spines: 2-2; Anal soft rays: 10-12. This species is distinguished by the following characters: D XIII-XIV,11-13 (mode XIII, 12); A II,10-12 (11); pectoral fin rays 17-21 (19); principal caudal fin rays 15; spiniform caudal fin rays 2; scale rows in longitudinal series 21-27 (26); tubed scales in lateral line 16-21 (19); scale rows above lateral line 3, below lateral line 9-10 (9); gill rakers 6-9 (7) + 20-25 (23) = 27-33 (30); smooth preopercular margin; caudal fin is deeply forked and without prolonged filaments; basal width of the pelvic fin axillary scale 1.7-2.8% of SL; basal width of scale between the pelvic fin bases is 2.2-3.9% of SL; distinct black blotch covering the upper two-thirds of pectoral fin base in juveniles and covering entire fin base in adults; absence of white spot at the end of dorsal fin base; no distinct markings on caudal peduncle; colour of caudal fin yellowish without dark band along each fin lobe (Ref. 94774).
Biology: 
IUCN Red List Status: Not Evaluated (N.E.) Ref. (130435)
Threat to humans:  harmless
Country info:  Known from Batan, Y'ami I. (Ref. 94774).


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