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🌊 Marine 🌡️ Tropical

Guam barred butterflyfish

Roa uejoi Matsunuma & Motomura, 2022
Max Length
10.1 cm
Max Weight
-
Lifespan
-
Trophic Level
3.6
Depth
-
Climate
Tropical
Resilience
High
Vulnerability
13.00/100
Typical Length
-
Depth Zone
reef

📖 Overview

Guam barred butterflyfish (Roa uejoi) is a ray-finned fish of the family Chaetodontidae. It inhabits marine (saltwater) waters in reef-associated environments. This species can reach a maximum total length of 10.1 cm. With a trophic level of 3.6, it is a mid-level predator.

Scientific Name
Roa uejoi
Authority
Matsunuma & Motomura, 2022
Habitat
Marine
Climate
Tropical
Max Length
10.1 cm
Trophic Level
3.6
Resilience
High
Vulnerability
13.00/100
Salinity
30–40 ppt

🐟 Physical Description

Dorsal spines (total): 11; Dorsal soft rays (total): 21 - 22; Anal spines: 3; Anal soft rays: 16 - 17; Vertebrae: 24. This species is distinguished from its congeners by the following set of characters: pored lateral-line scales 36-43; distal portion of the outer branch of first pelvic-fin soft ray a long filament, extending considerably from posterior contour of fin, first soft ray length 119%-123% of second ray; no black blotch on membranes associated with the first and second dorsal-fin spines; upper jaw naked, scaleless; pelvic-fin spine and first soft ray broadly whitish, and the remaining portions of fin black (in preserved specimens); the second black body band crossing pectoral-fin base, with no pale narrow interrupting lines; ocellated spot on dorsal-fin soft-rayed portion is more circular than oval, ratio of long axis/short axis of blotch 1.2-1.3 .Cross section: compressed.

🌀 Behaviour

Behavioural data for Guam barred butterflyfish is currently being reviewed.

🦐 Diet

Diet information for Guam barred butterflyfish is currently being compiled.

🥚 Reproduction

Reproduction data for Guam barred butterflyfish is currently being compiled.

🌍 Habitat & Distribution

Marine; reef-associated; depth range ? - 172 m . Tropical

🌿 Ecology

Zone Preferences
🌊 Marine 🪸 Reef Associated
Trophic Level
3.6±0.4

📐 Morphometrics

Length–Weight Relationship: W = 0.02239 × L3.01 (TL)
Max TL
10.1cm
Dorsal Spines
11
Dorsal Rays
22
Anal Spines
3
Anal Rays
17
Vertebrae
24

🌡️ Water Parameters & Tolerance

Salinity Range
30–40ppt

📊 Population Risk & Fisheries

Population Resilience
High
Minimum doubling time
Fishing Vulnerability
13.00/100
Low vulnerability
Trophic Level
3.6
Predator
Climate Zone
Tropical
Described By
Matsunuma & Motomura, 2022

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