Classification / Names
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Teleostei (teleosts) >
Ophidiiformes (Cusk eels) >
Bythitidae (Livebearing brotulas)
Etymology: Grammonus: Greek, gramma = signal, mark + Greek, onos = hake; nagaredai: provided a series of photographs taken in his aquarium.
Eponymy: Bronson Hiroki Nagareda (d: 1976) is a biologist and aquarist. [...] (Ref. 128868), visit book page.
More on authors: Randall & Hughes.
Environment: milieu / climate zone / depth range / distribution range
Ecology
Marine; benthopelagic; depth range 6 - 9 m (Ref. 79569). Tropical
Distribution
Territories | FAO areas | Ecosystems | Occurrences | Point map | Introductions | Faunafri
Pacific: Hawaiian Islands.
Size / Weight / Age
Maturity: Lm ?  range ? - ? cm
Max length : 82.0 cm SL male/unsexed; (Ref. 79569); 106.0 cm SL (female)
Short description
Identification keys | Morphology | Morphometrics
Dorsal soft rays (total): 86; Anal soft rays: 64 - 66; Vertebrae: 42. Predorsal scales extending to interorbital space; scales present on opercle and preopercle; three overlapping longitudinal rows of prominent sensory papillae on body; body depth at origin of dorsal fin 3.2–3.4 in SL; head length 3.15-3.2 in SL; mouth strongly oblique; edge of preopercle smooth except for a tiny spine at rounded corner; caudal fin joined only basally to dorsal and anal fins; normal life color dark
brown, the sensory papillae on head and body white.
From caves off O'ahu and Hawai'i (Ref. 79569).
Life cycle and mating behavior
Maturity | Reproduction | Spawning | Eggs | Fecundity | Larvae
Randall, J.E. and Hughes M.J., 2009. Grammonus nagaredai, a new viviparous marine fish (Ophidiiformes: Bythitidae) from the Hawaiian Islands. Pacific Science 63(1):137-146. (Ref. 79569)
IUCN Red List Status (Ref. 130435: Version 2025-2)
Threat to humans
Harmless
Human uses
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