Half-naked hatchetfish
📖 Overview
Oceanic and mesopelagic, mainly at 250-650 m . Depth range from 100-700 m and from 460-1082 m in the eastern Ionian Sea . Adults make marked vertical migrations . Found singly or in small groups . An opportunistic feeder at dusk on calanoid copepods, small fishes, etc . Sexual dimorphism with regard to body size , the males being slightly smaller than the females . Oviparous, with planktonic eggs and larvae . Occurs between 200 and 700 m depth during the day, concentrated between 350 and 550 m, and between 100 and 650 m at night, preferring a depth between 150 and 380 m Ref. 47377). Also Ref. 58302.
🔬 Taxonomy
🐟 Physical Description
Dorsal spines (total): 0; Dorsal soft rays (total): 8 - 9; Anal spines: 0; Anal soft rays: 11 - 12; Vertebrae: 36 - 39. Body bright silvery in color; body and trunk with dusky coloration at night . Branchiostegal rays: 10 .: short and / or deep.
🌀 Behaviour
Behavioural data for Half-naked hatchetfish is currently being reviewed.
🦐 Diet
🥚 Reproduction
Spawns more than once per season with egg batches about 50-500 egg/ovary pair, the number increasing with increased animal size .
🌍 Habitat & Distribution
Marine; bathypelagic; depth range 0 - 2400 m , usually 100 - 700 m . Deep-water; 60°N - 56°S north of British Isles to South Africa, including western Mediterranean.
🌿 Ecology
📐 Morphometrics
🌡️ Water Parameters & Tolerance
🛡️ Conservation Assessment
📊 Population Risk & Fisheries
🔍 Similar Species
🗺️ Global Occurrence Map
Occurrence records from the Global Biodiversity Information Facility (GBIF) - 366 records indexed .
👥 Community & Contribute
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