Actinopterygii (ray-finned fishes) > Beryciformes
(Sawbellies) > Trachichthyidae
Etymology: Optivus: Latin, optivus, -a-um = chosen.
Environment / Climate / Range
Marine; reef-associated; depth range 0 - 70 m (Ref. 89444), usually 15 - 35 m (Ref. 28787). Deep-water
Size / Weight / Age
Maturity: Lm ?  range ? - ? cm
Max length : 72.0 cm SL male/unsexed; (Ref. 31667)
Southwestern Pacific: Restricted to New Zealand.
Nocturnally active; inhabits cracks and crevices during the day. Feeds on small mobile benthic organisms (Ref. 26966), by drifting up to its prey and swallowing it whole with a sideways snap of the large extensible mouth (Ref. 26966).
Robins, C.R., R.M. Bailey, C.E. Bond, J.R. Brooker, E.A. Lachner, R.N. Lea and W.B. Scott, 1991. World fishes important to North Americans. Exclusive of species from the continental waters of the United States and Canada. Am. Fish. Soc. Spec. Publ. (21):243 p. (Ref. 4537)
IUCN Red List Status (Ref. 90363)
CITES (Ref. 94142)
Threat to humans
Fisheries: of no interest
Common namesSynonymsMetabolismPredatorsEcotoxicologyReproductionMaturitySpawningFecundityEggsEgg development
ReferencesAquacultureAquaculture profileStrainsGeneticsAllele frequenciesHeritabilityDiseasesProcessingMass conversion
Estimates of some properties based on models
Phylogenetic diversity index (Ref. 82805
= 0.6250 [Uniqueness, from 0.5 = low to 2.0 = high].
Bayesian length-weight: a=0.01318 (0.00635 - 0.02739), b=3.01 (2.82 - 3.20), based on LWR estimates for species & Subfamily-body shape (Ref. 93245
Trophic Level (Ref. 69278
): 3.5 ±0.5 se; Based on diet studies.
Resilience (Ref. 69278
Vulnerability (Ref. 59153
): High to very high vulnerability (71 of 100) .