Dark blind ray (Benthobatis moresbyi) fish species and Dark blind ray information

Scientific Name
Benthobatis moresbyi

Common Name
Dark blind ray

Biology
Dark brown dorsal and ventral surfaces; ventral entirely dark. Snout elongated, usually more than 1/3 in disc length (preocular snout region 40% in disc length in lectotype). Disc oval, longer than wide. Dorsal fins with long, fleshy bases which are much longer than height of the fin (dorsal fin length 50-55% of fin height). Origin of first dorsal well anterior to posterior tip of pelvic fins, close to mid pelvic length; dorsal fins close together, interdorsal space less than length of dorsal bases. Distance between second dorsal and caudal fins much smaller than length of base of second dorsal fin. Caudal fin extremely elongated, reaching almost 1/2 tail length as measured from posterior tips of pelvic fins; caudal fin length 40.4% of distance between cloaca and caudal fin tip (Ref. 48493).

Classification

Classified By

Alcock, 1898

Class

Sharks and Rays (Elasmobranchii)

Order

Electric rays (Torpediniformes)

Family

Numbfishes (Narcinidae)

Distribution

Region

Western Indian Ocean

Distribution

Western Indian Ocean: Arabian and Laccadive seas (off Travancore coast).

Range

Unknown

Environment

Climate

Deep-water

Water Temperature From

Unknown °C

Water Temperature To

Unknown °C

Depth From - meters

787 m

Depth To - meters

1071 m

Zone

bathydemersal

Environment

Marine; bathydemersal; depth range 787 - 1071 m (Ref. 48493)

Trophic Level

3.27 s.e. 0.39 Based on size and trophs of closest relatives

Occurs in Marine / Salt water

True

Occurs in Brackish water

False

Occurs in Fresh Water

False

Occurs on Reefs

False

Is kept in Aquariums

False

Physical Size and Genetics

Maximum Length

35.1 cm

Common Length

Unknown cm

Phylogenetic Diversity Index

PD50 = 0.5625 many relatives (e.g. carps) 0.5 - 2.0 few relatives (e.g. lungfishes)

Human Uses and Population

Human Uses

Unknown

Vulnerability

Low to moderate vulnerability (29 of 100)

Resilience

Low, minimum population doubling time 4.5 - 14 years (Assuming fecundity

Threat To Humans

Harmless

IUCN Red List Status

Data deficient (DD)

Dark blind ray (Benthobatis moresbyi) fish species and information / pictures of Dark blind ray - Benthobatis moresbyi

Dark blind ray (Benthobatis moresbyi) fish species information

Classification

Distribution

Environment

Physical Size and Genetics

Human Uses and Population