Oneirodes Heteronema

📖 Overview

Oneirodes Heteronema (Oneirodes heteronema), first described by Regan & Trewavas, 1932 is a small fish in the family Oneirodidae (order Lophiiformes). Adults typically reach 11.90 cm in maximum length. It inhabits marine coastal and open-ocean environments. Recorded depth range: 500 to 1250 metres. It occurs in Deep-water waters. Diet is predominantly piscivorous, targeting other fish and larger prey. On the IUCN Red List, it is classified as Least Concern.

🔬 Taxonomy

🐟 Physical Description

Dorsal soft rays (total): 5 - 6; Anal soft rays: 4. Characterized by having short illicium and high ratio between the lengths of upper and lower forks of the opercle; escal characters: esca with appendage bearing several filaments, two or three of which are stouter than others and darkly pigmented on distal one-third of length in specimens approximately 65mm and larger; anterior appendage internally pigmented in 91-mm specimen; pair of medial escal appendages each consisting of 3 primary branches, giving rise to numerous unpigmented tapering filaments; terminal escal papilla truncated, with distal streak of pigment in specimens 44mm and larger; stout posterior escal appendage bearing from 4-9 tapering filaments; absence of lateral escal appendages; subopercle without indentation on posterodorsal margin; length of ventral fork opercle 27.9-33.0% SL; ratio of lengths of dorsal and ventral forks of opercle 0.57-0.62; absence of epibrachial teeth; presence of teeth on pharyngobranchial II; upper jaw teeth 30-48, lower jaw teeth 30-56; teeth on vomer 4-7; dorsal fin rays 5-6; anal fin rays 4; pectoral fin rays 15-16; head length 34.6-45.4% SL; head depth 40.0-51.1% SL; length of premaxilla 29.5-35.2% SL; length of lower jaw 44.2-52.3% SL; length of illicium 18.7-21.6% SL .

🌀 Behaviour

Behavioural data for Oneirodes Heteronema is currently being reviewed.

🦐 Diet

🥚 Reproduction

🌍 Habitat & Distribution

Marine; bathypelagic; depth range 500 - 1250 m . Deep-water

🌿 Ecology

📐 Morphometrics

🌡️ Water Parameters & Tolerance

🛡️ Conservation Assessment

📊 Population Risk & Fisheries

🐠 Related Species

🔍 Similar Species

🗺️ Global Occurrence Map

Occurrence records from the Global Biodiversity Information Facility (GBIF) - 2 records indexed .

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