Longnose houndshark

📖 Overview

A little-known tropical shark found on the uppermost insular slopes at depths of 250-475 m. Stomach contents of a specimen included small Macrouridae (Hymenocephalus sp., Nezumia sp., Ventrifossa spp.), crustaceans (Penaeoidea, Munidae) and cephalopods . Viviparous, placental . Caught irregularly by the small-scale demersal longline fisheries operating in deepwater. Utilized for its meat and fins, but of limited value due to its small size.

🔬 Taxonomy

🐟 Physical Description

Dorsal spines (total): 0; Anal spines: 0. This species is distinguished by the following characters: snout long and narrow; preoral length 35.1% (34.9-38.7%) head length; eye large, its length 18.5% (17.0-24.1%) HL; gill slit rather short, first gill slit height 47.8% (31.4-51.6%) eye length; anterolateral teeth straight to slightly oblique, blade-like, with 1-3 broad, smooth distal cusplets; first dorsal-fin origin does not reach to the vertical line through the pectoral-fin base; caudal-fin ventral lobe is moderately developed in adults. Colouration: body generally grey, with faint dark edges on dorsal-fin apexes, more prominent in juveniles .: elongated; Cross section: angular.

🌀 Behaviour

Behavioural data for Longnose houndshark is currently being reviewed.

🦐 Diet

🥚 Reproduction

Viviparous, placental . With 4 or 5 young per litter . Size at birth near 23 cm (full-term fetuses) . Distinct pairing with embrace .

🌍 Habitat & Distribution

Marine; bathydemersal; depth range 250 - 475 m . Deep-water; 9°S - 26°S South China Sea (off Dongsha Atolll) to nw and ne Australia, including Indonesia, the Philippines, Papua New Guinea and Vanuatu.

🌿 Ecology

📐 Morphometrics

🌡️ Water Parameters & Tolerance

🛡️ Conservation Assessment

📊 Population Risk & Fisheries

🐠 Related Species

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