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💧 Freshwater Critically Endangered 🌡️ Tropical

Futuna's emperor

Akihito futuna Keith, Marquet & Watson, 2008
Max Length
6 cm
Max Weight
-
Lifespan
-
Trophic Level
-
Depth
-
Climate
Tropical
Resilience
High
Vulnerability
14.00/100
Typical Length
-
Depth Zone
-

📖 Overview

Occurs in swift clear streams with rocky bottom; collected at an altitude of 147 m. Observed to swim in open water and are not always on the bottom of the river. Although feeding habits have not been studied, a few examined specimens apparently feed on aquatic insects and crustaceans (Atyidae) .

Scientific Name
Akihito futuna
Authority
Keith, Marquet & Watson, 2008
Habitat
Freshwater
Climate
Tropical
IUCN Status
CR
Max Length
6 cm
Resilience
High
Vulnerability
14.00/100
Salinity
0–0.5 ppt

🔬 Taxonomy

Genus
Akihito
Akihito
Species
Futuna's emperor
Akihito futuna

🐟 Physical Description

Dorsal spines (total): 7; Dorsal soft rays (total): 9 - 10; Anal spines: 1; Anal soft rays: 9 - 10. Species distinguished by females having 4-7 closely set, slightly flexible tricuspid premaxillary teeth and 2-4 canine-like teeth at the tips of the premaxilla; adult males with 4-7 premaxillary fixed recurved conical to canine-like teeth; females with 19-20 scales along lateral midline; small tongue, rounded and mostly free from floor of mouth anteriorly; pelvic disc fused to belly between fifth rays only .

🌀 Behaviour

Behavioural data for Futuna's emperor is currently being reviewed.

🦐 Diet

Diet information for Futuna's emperor is currently being compiled.

🥚 Reproduction

Reproduction data for Futuna's emperor is currently being compiled.

🌍 Habitat & Distribution

Freshwater; benthopelagic. Tropical Endemic (Ref.

🌿 Ecology

Zone Preferences
💧 Freshwater
Food Items

aquatic insects and crustaceans (Atyidae) (ref

📐 Morphometrics

Length–Weight Relationship: W = 0.00389 × L3.12 (TL)
Max TL
6cm
Dorsal Spines
7
Dorsal Rays
10
Anal Spines
1
Anal Rays
10

🌡️ Water Parameters & Tolerance

Salinity Range
0–0.5ppt

🛡️ Conservation Assessment

IUCN Category
Critically Endangered
Assessment Date
2011

📊 Population Risk & Fisheries

Population Resilience
High
Minimum doubling time
Fishing Vulnerability
14.00/100
Low vulnerability
Climate Zone
Tropical
Described By
Keith, Marquet & Watson, 2008

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