Classification / Names
Common names | Synonyms | Catalog of Fishes (gen., sp.) | ITIS | CoL | WoRMS | Cloffa
Actinopterygii (ray-finned fishes) > Perciformes
(Perch-likes) > Gobiidae
(Gobies) > Gobiinae
Etymology: Amblygobius: Greek, amblys = darkness + Latin gobius = gudgeon (Ref. 45335); calvatus: Name from latin 'calvatus', meaning bald; referring to the lack of scales on the entire nape region.
Environment: milieu / climate zone / depth range / distribution range
Marine; reef-associated; depth range 10 - 20 m (Ref. 114936). Tropical
Countries | FAO areas | Ecosystems | Occurrences | Point map | Introductions | Faunafri
Western Pacific: Philippines; but most likely to be widely distributed in the East Indian region and western Pacific. Captured photograph from Chuuk in Micronesia may be this species.
Size / Weight / Age
Maturity: Lm ?  range ? - ? cm
Max length : 3.3 cm SL male/unsexed; (Ref. 114936); 4.8 cm SL (female)
Morphology | Morphometrics
Vertebrae: 26. This species is distinguished by the following characters: D VI + I,14-15; A I,15-16; caudal fin is strongly lanceolate, and is longer than head length; longitudinal scales 80-86; transverse scales 24-26; body scales entirely cycloid; scaleless on head, including side of nape and upper opercle; when alive grayish-brown with 2 orange-brown stripes on head and body, short upper stripe, ending before soft dorsal fin, the lower stripe horizontally ovate, orange-brown spot on opercle, continuing as a pale body stripe from upper pectoral-fin base to middle of caudal-fin base; pectoral-fin base pale with small, rectangular dark orange-brown spot across middle portion; series of 8-11 small black spots or saddles on upper back (Ref. 114936).
Occurs on silt-mud substratum in highly sheltered bays and lagoons; loosely scattered, mainly solitary individuals were encountered at the type locality; invariably associated with muddy burrows where they retreat when closely approached by divers (Ref. 114936).
Life cycle and mating behavior
Maturity | Reproduction | Spawning | Eggs | Fecundity | Larvae
Allen, G.R. and M.V. Erdmann, 2016. Descriptions of two new gobies (Gobiidae: Amblygobius) from the tropical western Pacific Ocean. J. Ocean Sci. Found. 24:10-23. (Ref. 114936)
IUCN Red List Status (Ref. 120744)
CITES (Ref. 118484)
Threat to humans
CountriesFAO areasEcosystemsOccurrencesIntroductionsStocksEcologyDietFood itemsFood consumptionRation
Common namesSynonymsMetabolismPredatorsEcotoxicologyReproductionMaturitySpawningSpawning aggregationFecundityEggsEgg development
ReferencesAquacultureAquaculture profileStrainsGeneticsAllele frequenciesHeritabilityDiseasesProcessingMass conversion
Estimates based on models
Phylogenetic diversity index (Ref. 82805
= 0.5000 [Uniqueness, from 0.5 = low to 2.0 = high].
Bayesian length-weight: a=0.00589 (0.00267 - 0.01297), b=3.10 (2.91 - 3.29), in cm Total Length, based on LWR estimates for this (Sub)family-body shape (Ref. 93245
Trophic Level (Ref. 69278
): 2.8 ±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.).
Vulnerability (Ref. 59153
): Low vulnerability (11 of 100) .