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🌊 Marine Least Concern 🌡️ Deep-water

Yawning

Poromitra oscitans Ebeling, 1975
Max Length
8.2 cm
Max Weight
-
Lifespan
-
Trophic Level
3.3
Depth
645–5320 m
Climate
Deep-water
Resilience
Medium
Vulnerability
43.00/100
Typical Length
-
Depth Zone
deep-water

📖 Overview

Trawled at depths greater than 800-1000 m ; seined with unclosing fishing gear at 4500-0 m and with closing fishing gear at depths of 1300-645 m .

Scientific Name
Poromitra oscitans
Authority
Ebeling, 1975
Habitat
Marine
Climate
Deep-water
Body Shape
Fusiform / normal
IUCN Status
LC
Max Length
8.2 cm
Depth Range
645–5320 m
Latitude
49°S – 45°N
Trophic Level
3.3
Resilience
Medium
Vulnerability
43.00/100
Salinity
30–40 ppt

🐟 Physical Description

Dorsal spines (total): 3; Dorsal soft rays (total): 9 - 10; Anal spines: 1; Anal soft rays: 7 - 8. This species is distinguished by the following characters: spinulated posterior and lower margins of the praeoperculum with the angular part of the praeoperculum having a non-spinulated notch; insertion of the ventral fins at the level of the vertical of the posterior margin of the pectoral fin insertion, or sometimes slightly shifted anteriad in small specimens; upper jaw extends beyond the vertical of the posterior eye margin; possess the smallest eyes among other species of the genus, 10.7-17.2 times in HL; soft rays on dorsal fin 9-10, in anal fin 7-8; first branchial arch with 23-25 rakers; vertebrae 24-25; pyloric caeca 7 .: fusiform / normal.

🌀 Behaviour

Behavioural data for Yawning is currently being reviewed.

🦐 Diet

aquatic invertebrates
small fish
algae
detritus

🥚 Reproduction

🐣 Oviparous 📦 Batch Spawner
Spawning Season
spring-summer
Spawn Location
Pelagic
Fertilization
External

🌍 Habitat & Distribution

Marine; bathypelagic; depth range 645 - 5320 m . Deep-water; 45°N - 49°S, 79°E - 109°W

🌿 Ecology

Zone Preferences
🌊 Marine 🌑 Deep Water
Trophic Level
3.3±0.3

📐 Morphometrics

Length–Weight Relationship: W = 0.01096 × L3.1 (TL)
Max TL
8.2cm
Dorsal Spines
3
Dorsal Rays
10
Anal Spines
1
Anal Rays
8

🌡️ Water Parameters & Tolerance

Salinity Range
30–40ppt

🛡️ Conservation Assessment

IUCN Category
Least Concern
Assessment Date
2019

📊 Population Risk & Fisheries

Population Resilience
Medium
Minimum doubling time
Fishing Vulnerability
43.00/100
Moderate vulnerability
Trophic Level
3.3
Predator
Body Shape
Fusiform / normal
Climate Zone
Deep-water
Latitude Range
45°N – 49°S
Described By
Ebeling, 1975

🌐 Names & Taxonomy

Language Common Names
🇬🇧English Listless Melamphid Fish · Tiny-eye Bigscale · Yawning
🌍CES velkošupinatka indonéská
🇯🇵Japanese Chihirokabutoo · チヒロカブトウオ
🇷🇺Russian Зевающая поромитра
🇨🇳Chinese 孔頭鯛 · 小眼犀孔鯛

📚 Scientific References

13 publications cited

General
  1. Froese, R. and Pauly, D. (Editors) (2024). FishBase. World Wide Web electronic publication. FishBase Consortium. Link ↗
Conservation
  1. IUCN (2024). The IUCN Red List of Threatened Species. Version 2024-1. International Union for Conservation of Nature. Link ↗
Taxonomy
  1. GBIF Secretariat (2024). GBIF Backbone Taxonomy. Checklist dataset. Global Biodiversity Information Facility. DOI ↗
Nutrition
  1. USDA Agricultural Research Service (2024). FoodData Central. USDA National Nutrient Database. United States Department of Agriculture. Link ↗
Fishery
  1. NOAA Fisheries (2024). FishWatch: U.S. Seafood Facts. National Oceanic and Atmospheric Administration. Link ↗
  2. Monterey Bay Aquarium (2024). Seafood Watch Recommendations. Monterey Bay Aquarium Foundation. Link ↗
Aquaculture
  1. FAO Fisheries and Aquaculture Department (2024). The State of World Fisheries and Aquaculture. Food and Agriculture Organization of the United Nations. Link ↗
Distribution
  1. Kaschner, K., Kesner-Reyes, K., Garilao, C., Segschneider, J., Rius-Barile, J., Rees, T., Froese, R. (2024). AquaMaps: Predicted range maps for aquatic species. AquaMaps. Link ↗
Ecology
  1. Nelson, J.S., Grande, T.C., Wilson, M.V.H. (2016). Fishes of the World. 5th edition. John Wiley & Sons.
Behavior
  1. Helfman, G.S., Collette, B.B., Facey, D.E., Bowen, B.W. (2009). The Diversity of Fishes: Biology, Evolution, and Ecology. 2nd edition. Wiley-Blackwell.
Morphology
  1. Froese, R. (2006). Cube law, condition factor and weight-length relationships: history, meta-analysis and recommendations. Journal of Applied Ichthyology, 22(4), 241-253. DOI ↗
Toxicology
  1. Halstead, B.W., Auerbach, P.S., Campbell, D. (1988). A Colour Atlas of Dangerous Marine Animals. Wolfe Medical Publications. Wolfe Medical.
Reproduction
  1. Balon, E.K. (1975). Reproductive Guilds of Fishes: A Proposal and Definition. Journal of the Fisheries Research Board of Canada, 32(6), 821-864.

🗺️ Global Occurrence Map

Occurrence records from the Global Biodiversity Information Facility (GBIF) - 5 records indexed .

Occurrence density from GBIF View GBIF records ↗

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