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🌊 Marine Data Deficient 🌡️ Deep-water

Formosan Hagfish

Myxine formosana Mok & Kuo, 2001
Max Length
76.8 cm
Max Weight
Lifespan
Trophic Level
3.4
Depth
588–1500 m
Climate
Deep-water
Resilience
Low
Vulnerability
55.00/100
Typical Length
Depth Zone
deep-water

📖 Overview

Overview information for Formosan Hagfish is currently being compiled by our editorial team.

Scientific Name
Myxine formosana
Authority
Mok & Kuo, 2001
Habitat
Marine
Climate
Deep-water
IUCN Status
DD
Max Length
76.8 cm
Depth Range
588–1500 m
Trophic Level
3.4
Resilience
Low
Vulnerability
55.00/100
Migration
Non-migratory
Salinity
30–40 ppt

🔬 Taxonomy

Kingdom
Animalia
Phylum
Chordata
Class
Hagfishes
Myxini
Order
Myxiniformes
Myxiniformes
Family
Myxinidae
Myxinidae
Genus
Myxine
Myxine
Species
Formosan Hagfish
Myxine formosana

🐟 Physical Description

Head white; body and tail grayish-black to dark purple. A 3-cusp multicusp on the anterior set of cusps and 2-cusp multicusp on the posterior set. Gill pouches, generally 5 pairs (rarely 4). Slime pores 0 - 4 (mostly 2) above the area between the anterior and posterior ends of the cloaca. Anterior unicusps 10 (8-12) on each side. Anterior part of ventral finfold (VFF) higher than posterior part (mostly vestigial). Caudal finfold (CFF) low to vestigial .: eel-like.

🌀 Behaviour

Behavioural data for Formosan Hagfish is currently being reviewed.

🦐 Diet

Diet information for Formosan Hagfish is currently being compiled.

🥚 Reproduction

Copulatory organ absent. The gonads of hagfishes are situated in the peritoneal cavity. The ovary is found in the anterior portion of the gonad, and the testis is found in the posterior part. The animal becomes female if the cranial part of the gonad develops or male if the caudal part undergoes differentiation. If none develops, then the animal becomes sterile. If both anterior and posterior parts develop, then the animal becomes a functional hermaphrodite. However, hermaphroditism being characterised as functional needs to be validated by more reproduction studies .

🌍 Habitat & Distribution

Marine; bathydemersal; non-migratory; depth range 588 - 1500 m . Deep-water

🌿 Ecology

Zone Preferences
🌊 Marine 🌑 Deep Water
Migration
Non-migratory
Trophic Level
3.4±0.6

📐 Morphometrics

Length–Weight Relationship: W = 0.00115 × L3.03 (TL)
Max TL
76.8cm

🌡️ Water Parameters & Tolerance

Salinity Range
30–40ppt

🛡️ Conservation Assessment

IUCN Category
Data Deficient
Assessment Date
2009

📊 Population Risk & Fisheries

Population Resilience
Low
Minimum doubling time
Fishing Vulnerability
55.00/100
Moderate-High vulnerability
Trophic Level
3.4
Predator
Climate Zone
Deep-water
Described By
Mok & Kuo, 2001

🌐 Names & Taxonomy

Language Common Names
🇬🇧English Formosan Hagfish
🇫🇮Finnish taiwaninlimaaja
🇨🇳Chinese 無目鰻 · 臺灣盲鰻 · 青眠鰻 · 鰻背 · 龍筋

🗺️ Global Occurrence Map

Occurrence records from the Global Biodiversity Information Facility (GBIF) — 4 records indexed .

Occurrence density from GBIF View GBIF records ↗

👥 Community & Contribute

Aquareap Community Observations
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