Notoraja ochroderma


Taxonomy [top]

Kingdom Phylum Class Order Family

Scientific Name: Notoraja ochroderma
Species Authority: McEachran & Last, 1994
Taxonomic Notes: Referred to as Notoraja sp. B in Last and Stevens (1994).

Assessment Information [top]

Red List Category & Criteria: Data Deficient ver 3.1
Year Published: 2009
Date Assessed: 2008-12-01
Assessor(s): Huveneers, C. & Last, P.R.
Reviewer(s): Notarbartolo di Sciara, G., Stevens, J.D. & Valenti, S.V. (Shark Red List Authority)
Notoraja ochroderma is a small, highly distinctive, deepwater skate, Notoraja ochroderma at depths of 400–465 m. This species is restricted to the continental slope off Cairns (Queensland). Its biology is virtually unknown as it is known from the type specimens only. Fisheries are not thought to operate within this species’ range at present but its restricted depth and geographic range could make it vulnerable to depletion in the future. This species is still very poorly known and cannot be assessed beyond Data Deficient without further study. If fishing activity began within this species' limited range in the future, this assessment would need to be revisited.

Geographic Range [top]

Range Description: Western Central Pacific: Australian endemic known only from the continental slope off Cairns (Queensland) (Last and Stevens 1994). Likely to only exist on seamounts offshore from northeastern Queensland.
Australia (Queensland)
FAO Marine Fishing Areas:
Pacific – western central
Range Map: Click here to open the map viewer and explore range.

Population [top]

Population: Little is known of the population. Its range is narrow and the area of occurrence is rarely surveyed.
Population Trend: Unknown

Habitat and Ecology [top]

Habitat and Ecology: A small deep-water skate, N. ochroderma can be found in the mid continental slope at depths of 400–465 m and attain at least 36 cm TL. Males mature at about 35 cm (Last and Stevens 1994). Its biology is virtually unknown, as N. ochroderma is known from type specimens only. A benthic species that probably feeds on invertebrates (including small to large crustaceans, cephalopods) and demersal bony fish. Oviparous and deposits eggs in large, quadrangular egg cases, like other skates (Last and Compagno 1999).
Systems: Marine

Threats [top]

Major Threat(s): N. ochroderma is unlikely to be of commercial value but is restricted to a narrow depth and geographical range. There is no current fishing pressure in its area of occurrence. However, trawling of N. ochroderma as bycatch could dramatically affect the population due its narrow range.

Conservation Actions [top]

Conservation Actions: Careful monitoring of fishing effort in the area of occurrence is needed to ensure that the current population is not detrimentally affected.

Citation: Huveneers, C. & Last, P.R. 2009. Notoraja ochroderma. The IUCN Red List of Threatened Species. Version 2015.2. <>. Downloaded on 30 August 2015.
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