Elasmobranchii (sharks and rays) >
Rajiformes (Skates and rays) >
Anacanthobatidae (Smooth skates)
Etymology: caerulea: Name from Latin ‘caeruleus’, allusion to its blue dorsal and ventral coloration.
More on authors: Last & Séret.
Taxonomic Remarks
Provisionally placed in Sinobatis in the absence of adult males being available for examination (Ref. 75174).
Environment: milieu / climate zone / depth range / distribution range
Ecology
Marine; bathydemersal; depth range 482 - 1168 m (Ref. 75174). Tropical; 21°S - 26°S, 111°E - 114°E (Ref. 75174)
Eastern Indian Ocean: off Western Australia (Refs. 75174, 114953).
Size / Weight / Age
Maturity: Lm ?  range ? - ? cm
Max length : 69.0 cm TL male/unsexed; (Ref. 75174)
Short description
Identification keys | Morphology | Morphometrics
This species is distinguished by the following set of characters: disc large, width at anterior orbit 8.0-9.1 times mouth width; tail short, postcloacal length 35-42% of disc length; eyes relatively small, orbit diameter 10.9-15.7 in horizontal snout and 13.1-17.9 in head lengths respectively; distal portion of tail weakly or slightly expanded, width of tail near tip 1.5-1.6 times tail width at its midlength; pectoral-fin radials 72-76; moderate-sized pelvic fins, anterior lobe 15.4-16.0% TL; anterior pelvic-fin lobe rather broad-based, width 1.7-2.2 in distance between pelvic-fin origins; caudal fin rudimentary; tooth rows in each jaw of adults 24-30; monospondylous vertebral centra 26-29, total centra 184-212; dorsal and ventral surfaces bluish in fresh specimens (Ref. 75174)..
Body shape (shape guide): other.
Found on upper continental slope. Life history unknown but presumably feeds on invertebrates and bony fishes (Ref. 114953).
Life cycle and mating behavior
Maturity | Reproduction | Spawning | Eggs | Fecundity | Larvae
Last, P.R. and B. Séret, 2008. Three new legskates of the genus Sinobatis (Rajoidei: Anacanthobatidae) from the Indo-West Pacific. Zootaxa 1671:33-58. (Ref. 75174)
IUCN Red List Status (Ref. 130435: Version 2025-2 (Global))
Threat to humans
Harmless
Human uses
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Estimates based on models
Phylogenetic diversity index (Ref. 82804) |
PD50 = 0.5020 [Uniqueness, from 0.5 = low to 2.0 = high]. |
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Bayesian length-weight
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a=0.01000 (0.00244 - 0.04107), b=3.04 (2.81 - 3.27), in cm total length, based on all LWR estimates for this body shape (Ref. 93245). |
Trophic level (Ref. 69278) |
3.8 ±0.7 se; based on size and trophs of closest relatives |
Fishing Vulnerability (Ref. 59153) |
Low to moderate vulnerability (31 of 100). 🛈 |