Black-tailed membranehead
📖 Overview
Black-tailed membranehead (Hymenocephalus yamasakiorum), first described by Nakayama, Endo & Schwarzhans, 2015 is a medium-sized fish in the family Macrouridae (order Gadiformes). Adults typically reach 15.10 cm in maximum length. It inhabits marine coastal and open-ocean environments. Recorded depth range: 380 to 420 metres. It occurs in Temperate waters. It feeds on a mix of small fish and invertebrates as a mid-level predator.
🔬 Taxonomy
🐟 Physical Description
This species is distinguished by the following characters: 9 pelvic-fin rays; chin barbel 55 % HL, its tip extending beyond vertical through hind margin of orbit when laid back; moderately high snout, not depressed, length 28 % HL; orbit diameter 33 % HL; interorbital width 24 % HL; preopercular supporter broad, short (5 % HL); D1 II,10; pectoral-fin rays i16-i17; gill rakers on first arch (outer/inner) 14/20, on second arch 20/19; pyloric caeca 15; when fresh the ventral two-thirds of head and body are silvery; dorsal half of posterior part of tail prominently dark; ventral half of tail completely immaculate; OL:OH = 1.15; ostial and caudal colliculi not fused; TCL:PCL = 2.3 .: elongated; Cross section: compressed.
🌀 Behaviour
Behavioural data for Black-tailed membranehead is currently being reviewed.
🦐 Diet
🥚 Reproduction
🌍 Habitat & Distribution
Marine; bathydemersal; depth range 380 - 420 m . Temperate Northwest Pacific: Japan.
🌿 Ecology
📐 Morphometrics
🌡️ Water Parameters & Tolerance
📊 Population Risk & Fisheries
🔍 Similar Species
👥 Community & Contribute
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