Hemigaleus microstoma   Bleeker,  1852 (Fish)
Organism information awaits expert curation
Taxonomy
Kingdom:Animalia
Phylum:Chordata
Class: Elasmobranchii
Order:Carcharhiniformes
Family:Hemigaleidae

Image copyrights: CSIRO

Description
Size: Max. length 114 cm TL male/unsexed

Color: Grey-brown above, lighter below, dorsal fins with white tips and posterior margins; sometimes white spots on sides of body.

A small shark. Body moderately slender; snout long, its length somewhat greater than mouth width, parabolic toward tip; labial furrows moderately long and easily seen, the uppers nearly reaching symphysis of lower jaw; anterior nasal flaps with a short, broad, triangular lobe; mouth very short and broadly arched, its length about 1/3 of the width; spiracles present, small; gill openings short, the longest slightly longer than eye length in adults, slightly shorter in young; teeth in upper jaw with very narrow, short, oblique cusps and prominent distal cusplets (except for those at symphysis), entirely smooth-edged; teeth in lower jaw very small, with arched roots and short, mostly erect, slender, straight cusps that do not protrude when mouth is closed, and no cusplets or serrations. First dorsal fin moderately large, with a pointed apex and short inner margin, its origin slightly posterior to free rear tips of pectorals and the free rear tip anterior to pelvic fin origins; second dorsal fin high, about 2/3 of length of first dorsal, with a short inner margin less than fin height, and its origin slightly anterior to anal fin origin; pectoral and pelvic fins strongly falcate, with deeply concave posterior margins; anal fin lightly smaller than second dorsal fin, without long preanal ridges; upper precaudal pit transverse and crescentic, no keels on caudal peduncle. Intestine with a spiral valve.

Dioecious, internal (oviduct) fertilization, internal live bearers. Viviparous, with a yolk-sac placenta; 4 to 14 fetuses in a litter; 2-4 pups after a gestation period of ~ 6 months; born at ~ 45-47 cm TL. Size of full-term fetuses (detached umbilical cords and placentae) ranges from 23.7 to 25.6 cm. Distinct pairing with embrace.


Synonym (s)
Negogaleus microstoma (Bleeker, 1852)

Common Name (s)
• Sicklefin Weasel Shark (English)
Economic Importance and Threats
Importance:  Commercial
(Utilized fresh for human consumption; offal used for fishmeal.)

Ecology
Habitat:  Demersal, Coastal
Trophic Level:  Tertiary Consumer
Prey:  Cephalopods, particularly octopi, crustaceans and small fish.
IUCN Status:  Least Concern

Biogeography


• South Coast INDIA
• INDIA

Literature Source(s)
  • Fischer, W and Bianchi, G (Eds.) (1984) FAO species identification sheets for fishery purposes. Western Indian Ocean (Fishing Area 51) FAO, Rome 5 Available at - http://www.fao.org/docrep/009/ad468e/ad468e00.HTM
  • Society for the Management of European Biodiversity Data (2009) World Register of Marine Species (WoRMS) Available at - http://www.marinespecies.org
  • Froese, R and Pauly, D (2000) Fishbase 2000: Concepts, design and data sources ICLARM 344 pp Available at - http://www.fishbase.org
  • Pillai, PKM and Augustine, SK (2000) A code list of common marine living resources of the Indian seas CMFRI Special Publication No.12 CMFRI 1-115 Available at - eprints.cmfri.org.in/3975/1/Special_Publication_No_12_Revised.pdf

Page last updated on:2011-10-10

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