Bathymaster derjugini Lindberg, 1930
photo by Markevich, A.I.

Family:  Bathymasteridae (Ronquils)
Max. size:  18 cm TL (male/unsexed)
Environment:  demersal; marine; depth range 0 - 65 m
Distribution:  Northwest Pacific: Kuril Islands and Tartar Strait to Peter the Great Bay, Japan Sea.
Diagnosis:  Dorsal spines (total): 2-2; Dorsal soft rays (total): 39-40; Anal spines: 1-2; Anal soft rays: 29-31. Resemble B. leurolepis but easily distinguished by a distinct dark (blue when fresh) blotch on the operculum, and a smaller number of lateral line scales. Attains about 15 cm SL.
Biology:  Inhabits rocky shore areas.
IUCN Red List Status: Data deficient (DD); Date assessed: 04 February 2009 Ref. (130435)
Threat to humans:  harmless


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