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🌊 Marine 🌡️ Temperate

Purple-black skate

Bathyraja caeluronigricans Ishiyama & Ishihara, 1977
Max Length
-
Max Weight
-
Lifespan
-
Trophic Level
4
Depth
200–400 m
Climate
Temperate
Resilience
Low
Vulnerability
68.00/100
Typical Length
-
Depth Zone
demersal

📖 Overview

Purple-black skate (Bathyraja caeluronigricans), first described by Ishiyama & Ishihara, 1977 is a fish in the family Arhynchobatidae (order Rajiformes). It inhabits marine coastal and open-ocean environments. Recorded depth range: 200 to 400 metres. It occurs in Temperate waters. Diet is predominantly piscivorous, targeting other fish and larger prey.

Scientific Name
Bathyraja caeluronigricans
Authority
Ishiyama & Ishihara, 1977
Habitat
Marine
Climate
Temperate
Body Shape
Other
Depth Range
200–400 m
Trophic Level
4
Resilience
Low
Vulnerability
68.00/100
Salinity
30–40 ppt

🔬 Taxonomy

🐟 Physical Description

This species is distinguished from its congeners in Bathyraja in having a dark purplish brown color on both sides of the body; the spiracle is longer than eyeball and with deep concavity at their anterior part; clasper with a deep cleft; dense silky fibers cover the egg capsule .: other.

🌀 Behaviour

Behavioural data for Purple-black skate is currently being reviewed.

🦐 Diet

small fish
crustaceans
cephalopods

🥚 Reproduction

🐣 Oviparous

Oviparous, paired eggs are laid. Embryos feed solely on yolk . Eggs have horn-like projections on the shell .

🌍 Habitat & Distribution

Marine; demersal; depth range 200 - 400 m . Temperate Northwest Pacific: north of Tôhoku, Japan to the Sea of Okhotsk.

🌿 Ecology

Zone Preferences
🌊 Marine ⬇️ Benthic
Trophic Level
4±0.7

📐 Morphometrics

Length–Weight Relationship: W = 0.00562 × L3.13 (TL)

🌡️ Water Parameters & Tolerance

Salinity Range
30–40ppt

📊 Population Risk & Fisheries

Population Resilience
Low
Minimum doubling time
Fishing Vulnerability
68.00/100
High vulnerability
Trophic Level
4
Apex / Top predator
Body Shape
Other
Climate Zone
Temperate
Described By
Ishiyama & Ishihara, 1977

🗺️ Global Occurrence Map

Occurrence records from the Global Biodiversity Information Facility (GBIF) - 1 records indexed .

Occurrence density from GBIF View GBIF records ↗

👥 Community & Contribute

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