Classification / Names
Common names | Synonyms | Catalog of Fishes (gen., sp.) | ITIS | CoL | WoRMS | Cloffa
Actinopterygii (ray-finned fishes) > Osmeriformes
(Smelts) > Opisthoproctidae
(Barreleyes or spookfishes)
Etymology: Bathylychnops: Greek, bathys = deep + Greek, lychnos = lamp + Greek, ops = appearance (Ref. 45335).
Environment / Climate / Range
Marine; benthopelagic. Temperate, preferred ?; 33°S - 34°S, 72°W - 75°W
Countries | FAO areas | Ecosystems | Occurrences | Point map | Introductions | Faunafri
Pacific Ocean: presently known only from the southeastern Pacific and possibly belongs to the fauna of temperate waters of the southern hemisphere (84273).
Size / Weight / Age
Maturity: Lm ?  range ? - ? cm
Max length : 6.2 cm SL male/unsexed; (Ref. 84273)
Morphology | Morphometrics
Eyes are vesicular, with an additional lens directed anteriorly; ventral fins are at the beginning of the last one third of the body, noticeably in front of the vertical of dorsal fin origin; anal opening and anal fin origin are behind the vertical of the end of dorsal fin; adipose fin is present and located near the vertical of the end of the anal fin; myomeres number 77–82; fry have 4–5 pigmental spots on the back and 3–4 paired peritoneal spots; pigmental spots present near upper margin of gill opening, at insertions of ventral fins near the end of the intestine, above the anal fin insertion, and under the adipose fin; gill rakers number 29–34.
Life cycle and mating behavior
Maturity | Reproduction | Spawning | Eggs | Fecundity | Larvae
Parin, N.V., Belyanina, T.N. and S.A. Evseenko, 2009. Materials to the revision of the genus Dolichopteryx and closely related taxa (Ioichthys, Bathylychnops) with the separation of a new genus Dolichopteroides and description of three new species (Fam. Opisthoproctidae). J. Ichthyol. 49(10):839-851. (Ref. 84273)
IUCN Red List Status (Ref. 109396)
CITES (Ref. 94142)
Threat to humans
CountriesFAO areasEcosystemsOccurrencesIntroductionsStocksEcologyDietFood itemsFood consumptionRation
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=0.01000 (0.00244 - 0.04107), b=3.04 (2.81 - 3.27), based on all LWR estimates for this body shape (Ref. 93245
Trophic Level (Ref. 69278
): 3.4 ±0.1 se; Based on size and trophs of closest relatives
Resilience (Ref. 69278
): High, minimum population doubling time less than 15 months (Preliminary K or Fecundity.).
Vulnerability (Ref. 59153
): Low vulnerability (15 of 100) .