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🌊 Marine 🌡️ Tropical

Tweddle's damselfish

Chromis tweddlei Lisher, Viana & Gon, 2024
Max Length
11.1 cm
Max Weight
-
Lifespan
-
Trophic Level
3
Depth
214–219 m
Climate
Tropical
Resilience
High
Vulnerability
27.00/100
Typical Length
-
Depth Zone
reef

📖 Overview

Tweddle's damselfish (Chromis tweddlei) is a ray-finned fish of the family Pomacentridae. It inhabits marine (saltwater) waters in reef-associated environments. This species can reach a maximum total length of 11.1 cm. It occurs at depths between 214 and 219 metres. With a trophic level of 3, it is a low-level carnivore, feeding on invertebrates and small organisms.

Scientific Name
Chromis tweddlei
Authority
Lisher, Viana & Gon, 2024
Habitat
Marine
Climate
Tropical
Body Shape
Short and / or deep
Max Length
11.1 cm
Depth Range
214–219 m
Trophic Level
3
Resilience
High
Vulnerability
27.00/100
Salinity
30–40 ppt

🐟 Physical Description

Dorsal spines (total): 4; Dorsal soft rays (total): 13 - 14; Anal spines: 2; Anal soft rays: 13 - 14. This species is distinguished by the following set of characters: body depth 2.0-2.1 in SL; D XIV, 13-14; A II, 14 (rarely 13); pectoral-fin rays 20 (rarely 19); procurrent spiniform caudal-fin rays 2; tubed lateral-line scales 18-19; scales above lateral line to dorsal-fin origin 4; circumpeduncular scales 13-14; gill rakers 8-9 + 21-23, total gill rakers 29-32; maxilla ending at vertical at anterior margin of orbit; black caudal band tapering anteriorly (anterior edge v-shaped) the full length of the caudal peduncle; caudal fin yellow with black posterior margin; distal third of anal fin blackish; dorsal fin yellow; upper half of pectoral fin yellow .: short and / or deep; Cross section: compressed.

🌀 Behaviour

Behavioural data for Tweddle's damselfish 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; reef-associated; depth range 214 - 219 m . Tropical Indian Ocean: Mauritius.

🌿 Ecology

Zone Preferences
🌊 Marine 🪸 Reef Associated
Trophic Level
3±0.1

📐 Morphometrics

Length–Weight Relationship: W = 0.0182 × L3 (TL)
Max TL
11.1cm
Dorsal Spines
4
Dorsal Rays
14
Anal Spines
2
Anal Rays
14

🌡️ Water Parameters & Tolerance

Salinity Range
30–40ppt

📊 Population Risk & Fisheries

Population Resilience
High
Minimum doubling time
Fishing Vulnerability
27.00/100
Low vulnerability
Trophic Level
3
Predator
Body Shape
Short and / or deep
Climate Zone
Tropical
Described By
Lisher, Viana & Gon, 2024

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