Crying Izak (Holohalaelurus melanostigma) fish species and information / pictures of Crying Izak - Holohalaelurus melanostigma

Crying Izak (Holohalaelurus melanostigma) fish species information

Scientific Name
Holohalaelurus melanostigma

Common Name
Crying Izak

Biology
This moderately sized shark is distinguished from its congeners by the following characters: denticles on dorsal midline slightly enlarged, from a point level to the pectoral origin on the dorsal midline to the first dorsal origin; no enlarged denticles on the dorsal surface of the pectoral fin; no club-shaped papillae on the distal tip of the clasper; buccal papillae in mouth inconspicuous; moderate to high vertebral count, 121 total in the holotype 115 and 119 (mean 116.8) for the paratypes; relatively high tooth counts, 57 total upper teeth in the holotype (54, 59, mean 57.8 for the paratypes), 50 total lower teeth in the holotype (49, 63, mean 55.8 for the paratypes); large brown spots, stripes and blotches on a dull grey-brown background; a distinct tear line marking from the anterior of the orbit to the lateral margin of the snout; white spots absent (Ref. 75585).

Classification

Classified By
Norman, 1939
Class
Sharks and Rays (Elasmobranchii)
Order
Ground sharks (Carcharhiniformes)
Family
Cat sharks (Scyliorhinidae)

Distribution

Region
Western Indian Ocean
Distribution
Western Indian Ocean: northern Tanzania and southern Kenya.
Range
4°S - 5°S

Environment

Climate
Tropical
Water Temperature From
Unknown °C
Water Temperature To
Unknown °C
Depth From - meters
607 m
Depth To - meters
658 m
Zone
bathydemersal
Environment
Marine; bathydemersal; depth range 607 - 658 m (Ref. 75585)
Trophic Level
4.09 s.e. 0.61 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
38.4 cm
Common Length
Unknown cm
Phylogenetic Diversity Index
PD50 = 0.5312 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 (26 of 100)
Resilience
High, minimum population doubling time less than 15 months (Preliminary K or Fecundity.)
Threat To Humans
  Harmless
IUCN Red List Status
  Data deficient (DD)