Kermadec spiny dogfish

📖 Overview

Kermadec spiny dogfish (Squalus raoulensis) is a ray-finned fish of the family Squalidae. It inhabits marine (saltwater) waters in pelagic environments. This species can reach a maximum total length of 68.1 cm. With a trophic level of 4.1, it is a mid-level predator. It is assessed as Least Concern on the IUCN Red List.

🔬 Taxonomy

🐟 Physical Description

This species is distinguished by the following combination of characters: width of mouth 2.4 - 2.7 times horizontal prenarial length; direct pre-second dorsal length 3.6 - 4 times pectoral-fin anterior margin, 2.7 - 2.9 times dorsal caudal margin; preoral length 3 - 3.2 times horizontal prenarial length, 2.3 - 2.5 times internarial width; bifurcate anterior nasal flap; first dorsal fin upright and rounded apically; dorsal-fin spines not robust, width of exposed bases 0.6 - 0.7% TL: first dorsal-fin height 1.2 - 1.4 times its inner margin length; second dorsal-fin height 0.85 - 0.93 times its inner margin length; pectoral-fin anterior margin 1.7 - 1.8 times its inner margin length; preventral caudal margin 1.7 - 2.3 times inner margin of pelvic fin; caudal fin pale with strongly demarcated, whitish posterior margin, no caudal bar; flank denticles unicuspid; monospondylous centra 41-43, precaudal centra 84-85, total centra 112-113; maximum adult size at least 73 cm TL .: elongated.

🌀 Behaviour

Behavioural data for Kermadec spiny dogfish is currently being reviewed.

🦐 Diet

Diet information for Kermadec spiny dogfish is currently being compiled.

🥚 Reproduction

Distinct pairing with embrace .

🌍 Habitat & Distribution

Marine; pelagic-oceanic; depth range ? - 320 m . Tropical Southwest Pacific: known only from the upper insular slope west of Napier Island (off Raoul Island) and north of Raoul Island on the Kermadec Ridge.

🌿 Ecology

📐 Morphometrics

🌡️ Water Parameters & Tolerance

🛡️ Conservation Assessment

📊 Population Risk & Fisheries

🐠 Related Species

🔍 Similar Species

👥 Community & Contribute