Actinopteri (ray-finned fishes) > Gobiiformes
(Gobies) > Gobiidae
(Gobies) > Gobiinae
Etymology: Trimma: Greek, trimma, -atos = something crushed (Ref. 45335); christianeae: Named for Christiane Waldrich, who photographed this fish; noun in the genitive case.
Environment: milieu / climate zone / depth range / distribution range
Marine; reef-associated; depth range 1 - 4 m (Ref. 119492). Tropical
Western Pacific: Papua New Guinea.
Size / Weight / Age
Maturity: Lm ?  range ? - ? cm
Max length : 2.0 cm SL male/unsexed; (Ref. 119492)
Morphology | Morphometrics
soft rays: 8. This species is distinguished by the following combination of characters: D VI + I,9, with the second dorsal-fin spine usually with short filament, when adpressed extending to the base of first to fourth segmented dorsal-fin ray; A I,8; the fifth segmented pelvic-fin ray with sequential branching consisting of three branch points, its length 76.9-87.5% (mean 83.4%) length of fourth ray; the basal membrane of pelvic fin is fully developed; gill rakers on first arch 3-4 + 12-13; opercle scaleless; posterior naris is large and adnate to orbital rim. Colour in life mainly orange to brownish red with diffuse brown scale margins that form a reticulated pattern; indistinct narrow white or gray bars (sometimes branching) along back and dorsalmost part of caudal peduncle; the pectoral-fin base with distinctive orange to reddish-brown medial area with large white spots dorsally and ventrally (Ref. 119492).
Species collected from jetty pilings, log debris, and concrete stairs at the water’s edge, at about 1-4 meters. It seems to have an affinity for sponge-encrusted surfaces, but the general area where it is observed is characterized by extensive silty mud substrata inhabited by a large number of burrowing gobies. It was not previously observed despite nearly 100 hours of scuba-diving because the collection site is immediately adjacent to shore at a busy shipyard where diving is usually banned during daylight hours. Most of the specimens were found on the inner side of a single pillar of the jetty, which was situated in total shade (Ref. 119492).
Life cycle and mating behavior
Maturity | Reproduction | Spawning | Eggs | Fecundity | Larvae
Allen, G.R., 2019. Trimma christianeae, a new species of goby (Teleostei: Gobiidae) from Milne Bay Province, Papua New Guinea. J. Ocean Sci. Found. 32:39-46. (Ref. 119492)
IUCN Red List Status (Ref. 123251)
CITES (Ref. 123416)
Threat to humans
Common namesSynonymsMetabolismPredatorsEcotoxicologyReproductionMaturitySpawningSpawning aggregationFecundityEggsEgg development
ReferencesAquacultureAquaculture profileStrainsGeneticsAllele frequenciesHeritabilityDiseasesProcessingNutrientsMass conversion
Estimates based on models
Phylogenetic diversity index (Ref. 82805
= No PD50 data [Uniqueness, from 0.5 = low to 2.0 = high].
Bayesian length-weight: a=0.00575 (0.00261 - 0.01268), b=3.09 (2.91 - 3.27), in cm total length, based on LWR estimates for this (Sub)family-body shape (Ref. 93245
Resilience (Ref. 120179
): High, minimum population doubling time less than 15 months (Preliminary K or Fecundity.).
Vulnerability (Ref. 59153
): Low vulnerability (10 of 100) .