Elasmobranchii (sharks and rays) > Rajiformes
(Skates and rays) > Rajidae
Etymology: Malacoraja: Greek, malakos = soft + Latin, raja, -ae = ray, fis (Raja sp.) (Ref. 45335); obscura: Specific name derived from the Latin obscurus, meaning dark or indistinct, in reference to the the subtle nature of the differences separating this species from its congeners..
Environment: milieu / climate zone / depth range / distribution range
Marine; bathydemersal; depth range 808 - 1105 m (Ref. 72455). Tropical
Countries | FAO areas | Ecosystems | Occurrences | Point map | Introductions | Faunafri
Southwestern Atlantic: continental slope of southeastern Brazil, off the states of Espirito Santo (19°39' S, 38°38' W) and Rio de Janeiro (21°46' S, 39°53' W).
Size / Weight / Age
Maturity: Lm ?  range ? - ? cm
Max length : 68.0 cm TL male/unsexed; (Ref. 72455)
Life cycle and mating behavior
Maturity | Reproduction | Spawning | Eggs | Fecundity | Larvae
de Carvalho, M.R., U.L. Gomes and O.B.F. Gadig, 2005. Description of a new species of skate of the genus Malacoraja Stehmann, 1970: the first species from the southwestern Atlantic Ocean, with notes on generic monophyly and composition (Chondrichthyes: Rajidae). Neotrop. Ichthyol. 3(2):239-258. (Ref. 72455)
IUCN Red List Status (Ref. 125652)
Threat to humans
CountriesFAO areasEcosystemsOccurrencesIntroductionsStocksEcologyDietFood itemsFood consumptionRation
Common namesSynonymsMetabolismPredatorsEcotoxicologyReproductionMaturitySpawningSpawning aggregationFecundityEggsEgg development
ReferencesAquacultureAquaculture profileStrainsGeneticsAllele frequenciesHeritabilityDiseasesProcessingNutrientsMass conversion
Estimates based on models
Preferred temperature (Ref. 115969
): 4 - 4.5, mean 4.1 °C (based on 7 cells).
Phylogenetic diversity index (Ref. 82805
= 0.5625 [Uniqueness, from 0.5 = low to 2.0 = high].
Bayesian length-weight: a=0.00302 (0.00143 - 0.00636), b=3.23 (3.06 - 3.40), in cm total length, based on LWR estimates for this Subfamily-BS (Ref. 93245
Trophic level (Ref. 69278
): 3.5 ±0.4 se; based on size and trophs of closest relatives
Resilience (Ref. 120179
): Medium, minimum population doubling time 1.4 - 4.4 years (Preliminary K or Fecundity.).
Fishing Vulnerability (Ref. 59153
): Moderate to high vulnerability (47 of 100) .
Climate Vulnerability (Ref. 125649
): (0 of 100) .