Actinopterygii (ray-finned fishes) > Perciformes
(Perch-likes) > Bathymasteridae
Etymology: Ronquilus: Spanish, "ronquillo" = slightly hoarse; jordani: Named after David Starr Jordan, U.S. ichthyologist (Ref. 6885). More on author: Gilbert.
Environment: milieu / climate zone / depth range / distribution range
Marine; demersal; depth range 3 - 275 m (Ref. 6793). Temperate; - 37°N
Eastern Pacific: Pribilof Canyon in the Bering Sea and Amchitka Island in the Aleutian chain to Monterey Bay, California, USA.
Size / Weight / Age
Maturity: Lm ?  range ? - ? cm
Max length : 20.0 cm TL male/unsexed; (Ref. 48889)
soft rays: 31 - 34. Caudal rounded (Ref. 6885). Males orange dorsally, dull olive green ventrally; vague darker vertical bars on sides, fine yellow longitudinal lines below lateral line canal, and yellow on upper part of pectoral fin; golden bars below eye and across middle of cheek; black on top of head and across occiput, and behind eye; dusky blotch at anterior end of dorsal fin; black margined with yellow on dorsal and caudal fins; iridescent light blue margined with black on anal fin with golden spots at base; pelvic fins and lower parts of pectorals black. Females olive green dorsally, lighter ventrally; yellow longitudinal lines on sides; reddish on occiput; dusky blotch on anterior part of dorsal fin; bright orange on edges of dorsal and caudal; pale light blue margined with brown on anal; white on pelvic fins (Ref. 6885).
Usually among rocks (Ref. 2850).
Life cycle and mating behavior
Maturity | Reproduction | Spawning | Eggs | Fecundity | Larvae
Eschmeyer, W.N., E.S. Herald and H. Hammann, 1983. A field guide to Pacific coast fishes of North America. Boston (MA, USA): Houghton Mifflin Company. xii+336 p. (Ref. 2850)
IUCN Red List Status (Ref. 119314)
CITES (Ref. 115941)
Threat to humans
Aquarium: public aquariums
Estimates of some properties based on models
Preferred temperature (Ref. 115969
): 3.2 - 8.9, mean 5.7 (based on 254 cells).
Phylogenetic diversity index (Ref. 82805
= 1.0078 [Uniqueness, from 0.5 = low to 2.0 = high].
Bayesian length-weight: a=0.00389 (0.00180 - 0.00842), b=3.12 (2.94 - 3.30), in cm Total Length, based on all LWR estimates for this body shape (Ref. 93245
Trophic Level (Ref. 69278
): 3.1 ±0.29 se; Based on food items.
Resilience (Ref. 69278
Vulnerability (Ref. 59153
): Low vulnerability (10 of 100) .