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Teleostei (teleosts) > Ophidiiformes (Cusk eels) > Bythitidae (Livebearing brotulas)
Etymology: Grammonus: Greek, gramma = signal, mark + Greek, onos = hake; minutus: The specific name, minutus, refers to the short length at which the males attain maturity and ripen (Ref. 84063).
More on authors: Nielsen & Prokofiev.

Environment: milieu / climate zone / depth range / distribution range Ecology

Marine; benthopelagic; depth range 70 - 119 m (Ref. 94063). Tropical; 13°N - 12°N, 109°E - 110°E

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Pacific Ocean: off Central Vietnam. Known from two localities (Ref. 84063).

Size / Weight / Age

Maturity: L_m ? range ? - ? cm
Max length : 5.5 cm SL male/unsexed; (Ref. 84063)

Short description Identification keys | Morphology | Morphometrics

Grammonus minutus differs from the nine described Grammonus species since it exhibits the following combination of characters: fin rays in dorsal 75–76, anal 54–55, pectoral 22–23, number of vertebrae 12 + 30, interorbital 7.4% of SL. Males have already reached maturity by a length of 32 mm SL.

Depending on the changes in the current system in the Bay of Nha Trang and adjoining areas, juveniles and adolescents of deep-water fishes occur in the collection area at these shallow depths. According to T.T. Hieu, Institute of Oceanography, Nha Trang (personal communication, 2009), there are a number of deep canyons cutting into the outer shelf, which explains the capture of many relatively deep-living species. It is thus possible that G. minutus may live deeper than indicated by the actual trawling depths (Ref. 84063).

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Main reference Upload your references | References | Coordinator | Collaborators

Nielsen, J.G. and A.M. Prokofiev, 2010. A new, dwarf species of Grammonus (Teleostei: Bythitidae) found off Vietnam. Ichthyol. Res. 57:189-192. (Ref. 84063)

IUCN Red List Status (Ref. 130435)

Data deficient (DD) ; Date assessed: 16 August 2019

CITES

Not Evaluated

CMS (Ref. 116361)

Not Evaluated

Threat to humans

Harmless

Human uses

FAO - Publication: search | FishSource |

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Estimates based on models

Phylogenetic diversity index (Ref. 82804): PD₅₀ = 0.5005 [Uniqueness, from 0.5 = low to 2.0 = high].

Bayesian length-weight: a=0.01995 (0.00906 - 0.04395), b=3.01 (2.83 - 3.19), in cm total length, based on all LWR estimates for this body shape (Ref. 93245).

Trophic level (Ref. 69278): 3.3 ±0.5 se; based on size and trophs of closest relatives

Fishing Vulnerability (Ref. 59153): Low vulnerability (10 of 100).

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Grammonus minutus Nielsen & Prokofiev, 2010