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Gobiiformes (Gobies) >
Gobiidae (Gobies) > Gobiinae
Etymology: Cryptocentrus: Greek, kryptos = hidden + Greek, kentron = sting (Ref. 45335); epakros: Name from Greel 'epakros' meaning pointed at the end; referring to the diagnostic anal fin
shape, consisting of elongated seventh and eighth fin rays that result in a conspicuous pointed posterior fin profile.
Environment: milieu / climate zone / depth range / distribution range
Ecology
Marine; benthopelagic; depth range 12 - 15 m (Ref. 116711). Tropical
Western Pacific: Papua New Guinea.
Size / Weight / Age
Maturity: Lm ? range ? - ? cm
Max length : 5.0 cm SL male/unsexed; (Ref. 116711); 3.4 cm SL (female)
Short description
Identification keys | Morphology | Morphometrics
Dorsal spines (total): 7; Dorsal soft rays (total): 10; Anal spines: 1; Anal soft rays: 9. Dorsal-fin rays VI-I,10; anal-fin rays I,9; pectoral-fin rays 15; scales in longitudinal series 47; median predorsal scales 19; body scales entirely cycloid, including abdomen, and prepelvic region; pectoral-fin base and head naked except side of nape and predorsal region; preopercular-canal pore N absent; gill opening extending forward to a vertical at posterior edge of preopercle; seventh and eighth anal-fin rays prolonged, resulting in distinctly pointed posterior anal-fin profile; longest anal-fin rays 1.1 in HL; caudal fin rounded, longer than head, 3.1 in SL; pelvic fins relatively short, not reaching posteriorly to anus, 4.7 in SL; color of female generally golden brown with six faint dark bars from nape to caudal-fin base, interspersed with yellowish, slightly narrower interspaces; both dorsal fins with vertical, dark-edged orange markings between each spine and ray, interrupted to form spots on outer half of fin; second dorsal fin with pale blue submarginal stripe; anal fin dusky yellow brown, except posteriormost portion (encompassing last three rays) bright yellow; caudal fin is yellow to brownish with longitudinal blue streak between most rays of middle portion; pelvic-fin rays are dusky brownish; male (not collected, but presumed to be the same species) with 4 oblique and narrow orange bands (usually wavy and interrupted) on the cheek and opercle and have more vivid dark bars on body (Ref. 116711).
Body shape (shape guide): elongated; Cross section: compressed.
The area of collection consists of moderately sloped (ca.20 degrees) mud substratum, where the slope begins in approximately 1.5 m depth and flattens out at about 18 m. The featureless bottom have numerous burrows occupied by a variety of fishes and invertebrates, including Cryptocentrus epakros. Three individuals (the female holotype, a presumed male, and another female) were observed in 12.5-15.0 m depth. Each individual was invariably associated with an unidentified alpheid shrimp (colour overall is pale greyish with bright pink legs and a pink claw with a bluish tip). The female holotype was in close proximity (about 30 cm) to the presumed male, which occupied a separate burrow (Ref. 116711).
Life cycle and mating behavior
Maturity | Reproduction | Spawning | Eggs | Fecundity | Larvae
Allen, G.R., 2015. Descriptions of two new gobies species of shrimpgobies (Gobiidae: Cryptocentrus and Tomiyamichthys) from Papua New Guinea. J. Ocean Sci. Found. 16:67-81. (Ref. 116711)
IUCN Red List Status (Ref. 130435: Version 2025-1)
Threat to humans
Harmless
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Estimates based on models
Phylogenetic diversity index (Ref.
82804): PD
50 = 0.5000 [Uniqueness, from 0.5 = low to 2.0 = high].
Bayesian length-weight: a=0.00724 (0.00339 - 0.01546), b=3.10 (2.92 - 3.28), in cm total length, based on LWR estimates for this (Sub)family-body shape (Ref.
93245).
Trophic level (Ref.
69278): 3.2 ±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).
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