リュウグウハダカ
📖 Overview
リュウグウハダカ (Polymetme elongata), first described by Matsubara, 1938 is a medium-sized fish in the family Yarrellidae (order Stomiiformes). Adults typically reach 18.40 cm in maximum length. It inhabits marine coastal and open-ocean environments. It occurs in Deep-water waters. It feeds on a mix of small fish and invertebrates as a mid-level predator. On the IUCN Red List, it is classified as Least Concern.
🔬 Taxonomy
🐟 Physical Description
Dorsal spines (total): 0; Dorsal soft rays (total): 11 - 13; Anal spines: 0; Anal soft rays: 28 - 33; Vertebrae: 43 - 45. Differs from all species of Polymetme in having more fusiform and elongated body and a smaller head; pyloric caeca 7; photophores above anal fin 16-18 .
🌀 Behaviour
Behavioural data for リュウグウハダカ is currently being reviewed.
🦐 Diet
🥚 Reproduction
🌍 Habitat & Distribution
Marine; benthopelagic; depth range ? - 350 m . Deep-water East China Sea, and the Philippines.
🌿 Ecology
📐 Morphometrics
🌡️ Water Parameters & Tolerance
🛡️ Conservation Assessment
📊 Population Risk & Fisheries
🌐 Names & Taxonomy
| Language | Common Names |
|---|---|
| 🇯🇵Japanese | Ryuguhadaka · リュウグウハダカ |
Scientific Synonyms
| Scientific Name | Author | Year | Status |
|---|---|---|---|
| Yarrella blackfordi elongata | Matsubara | 1938 | Synonym |
🔍 Similar Species
🗺️ Global Occurrence Map
Occurrence records from the Global Biodiversity Information Facility (GBIF) - 1 records indexed .
👥 Community & Contribute
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