Grallenia nigrifasciata

Grallenia nigrifasciata Allen, Erdmann & Cahyani, 2024

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Teleostei (teleosts) > Gobiiformes (Gobies) > Gobiidae (Gobies) > Gobiinae
Etymology: Grallenia: Named for Gerald R. Allen, (G+R+Allen+suffix '-ia'), in honor of his great contribution to our knowledge of the diversity of coral-reef fishes; nigrifasciata: Name 'nigrifasciata' from the Latin word meaning 'black-striped', in reference to the basal black stripe on the dorsal fins of the new species.
Eponymy: Dr Gerald Ray Allen (d: 1942) The genus was named to honour “…his great contribution to our knowledge of the diversity of coral-reef fishes.” (See Allen, GR) (Ref. 128868), visit book page.

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

Marine; reef-associated; depth range ? - 45 m (Ref. 138626). Tropical

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Eastern Indian Ocean: Indonesia.

Size / Weight / Age

Maturity: Lm ?  range ? - ? cm
Max length : 1.7 cm SL male/unsexed; (Ref. 138626); 1.8 cm SL (female)

Short description Identification keys | Morphology | Morphometrics

Dorsal spines (total): 7; Dorsal soft rays (total): 9 - 10; Anal spines: 1; Anal soft rays: 9 - 10. This species is distinguished from its congeners by the following set of characters: dorsal rays VI + I,9-10 (usually 10), absence of elongate spines; anal rays I,9-10 (usually 10); pectoral rays 16-17 (usually 17); absence of pelvic frenum; absence of cephalic sensory canals and associated pores; total longitudinal scales 23-26 (mean 24), median row either continuous from behind pectoral-fin base to caudal-fin base or interrupted below first dorsal fin by scaleless gap; main mass of body scales extending forward from caudal-fin base to below anterior portion of second dorsal fin; colour in alcohol pale yellowish and mainly unmarked except three widely spaced, tiny brown spots or horizontally elongate streaks in mid-lateral row on side of body; clusters of melanophores on side and frontal region of head, and numerous, minute white spots covering abdominal region; fins semi-translucent except dorsal fins with pair of blackish basal stripes (merging to form broad, solid stripe on posterior half of first-dorsal fin); additional, narrow, poorly defined dark stripes on middle and outer portion of dorsal fins; and dense network of microscopic, brownish striations, giving overall dusky appearance to membranes of caudal, anal, and pelvic fins (Ref. 138626).
Body shape (shape guide): elongated; Cross section: oval.

Biology     Glossary (e.g. epibenthic)

Life cycle and mating behavior Maturity | Reproduction | Spawning | Eggs | Fecundity | Larvae

Main reference Upload your references | References | Coordinator | Collaborators

Allen, G.R. and M.V. Erdmann, 2024. Appendix: Descriptions of twenty-four new species of reef fishes from the East Indian region. pp. 1270-1367. In Reef Fishes of the East Indies (2nd ed., Vol. 3). Tropical Reef Research. (Ref. 138626)

IUCN Red List Status (Ref. 130435: Version 2025-2 (Global))

Not Evaluated 

CITES

Not Evaluated

CMS (Ref. 116361)

Not Evaluated

Threat to humans

  Harmless





Human uses

FAO - Publication: search | FishSource |

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Internet sources

AFORO (otoliths) | Aquatic Commons | BHL | Cloffa | Websites from users | Check FishWatcher | CISTI | Catalog of Fishes: genus, species | DiscoverLife | ECOTOX | FAO - Publication: search | Faunafri | Fishipedia | Fishtrace | GloBI | Google Books | Google Scholar | Google | IGFA World Record | OneZoom | Open Tree of Life | Otolith Atlas of Taiwan Fishes | PubMed | Reef Life Survey | Socotra Atlas | TreeBase | Tree of Life | Wikipedia: Go, Search | World Records Freshwater Fishing | Zoobank | Zoological Record

Estimates based on models

Phylogenetic diversity index
(Ref. 82804) 		PD50 = 0.5000 [Uniqueness, from 0.5 = low to 2.0 = high].
Bayesian length-weight a=0.00741 (0.00346 - 0.01589), b=3.09 (2.91 - 3.27), in cm total length, based on LWR estimates for this (Sub)family-body shape (Ref. 93245).
Trophic level
(Ref. 69278) 		3.0   ±0.3 se; based on size and trophs of closest relatives
Resilience
(Ref. 120179) 		High, minimum population doubling time less than 15 months (Preliminary K or Fecundity.).
Fishing Vulnerability
(Ref. 59153) 		Low vulnerability (10 of 100). 🛈