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🌊 Marine 🌡️ Tropical

Yellow-brown chromis

Chromis xouthos Allen & Erdmann, 2005
Max Length
9.2 cm
Max Weight
Lifespan
Trophic Level
3
Depth
12–50 m
Climate
Tropical
Resilience
High
Vulnerability
24.00/100
Typical Length
Depth Zone
reef

📖 Overview

This species is usually encountered in clear water over coral reefs at depths between about 12 and at least 45 m. Habitats include both gradually sloping bottoms and steeper drop-offs, but in the former case it was restricted to depths greater than 20 m in the vicinity of isolated, small patch reefs. Generally, this species forms aggregations ranging from just a few fish to at least 20-30 individuals, feeding on plankton up to several meters above the bottom. The fish retreat to caves, crevices, and ledges when approached closely by divers . Life history characteristics for the family specify that this species is oviparous, with distinct pairing during breeding . Eggs are demersal and adhere to the substrate . Males guard and aerate the eggs .

Scientific Name
Chromis xouthos
Authority
Allen & Erdmann, 2005
Habitat
Marine
Climate
Tropical
Body Shape
Short and / or deep
Max Length
9.2 cm
Depth Range
12–50 m
Trophic Level
3
Resilience
High
Vulnerability
24.00/100
Salinity
30–40 ppt

🐟 Physical Description

Dorsal spines (total): 13; Dorsal soft rays (total): 12; Anal spines: 2; Anal soft rays: 11 - 12; Vertebrae: 26. This species is distinguished by the following characters: DXIII,12; A II,11 (rarely 12); pectoral rays 19 (rarely 18); spiniform caudal rays 3; tubed lateral line scales 16-17; gill rakers 6-7 + 19-21 (total, 26-28); body depth 1.9-2.0 in SL; colour when alive is mainly golden brown with yellowish caudal fin and pale bluish-grey pelvic fins .: short and / or deep; Cross section: compressed.

🌀 Behaviour

Behavioural data for Yellow-brown chromis is currently being reviewed.

🦐 Diet

Diet information for Yellow-brown chromis is currently being compiled.

🥚 Reproduction

🐣 Oviparous
Spawn Location
Demersal

Life history characteristics for the family specify that this group is oviparous, with distinct pairing during breeding . Eggs are demersal and adhere to the substrate . Males guard and aerate the eggs .

🌍 Habitat & Distribution

Marine; reef-associated; depth range 12 - 50 m . Tropical Indian Ocean: Maldive Islands and Chagos Archipelago to off the Andaman Sea coast of Thailand; and Indonesia; probably Andaman and Nicobar Islands, and Mergui Archipelago, off Myanmar.

🌿 Ecology

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

📐 Morphometrics

Length–Weight Relationship: W = 0.0182 × L3 (TL)
Max TL
9.2cm
Dorsal Spines
13
Dorsal Rays
12
Anal Spines
2
Anal Rays
12
Vertebrae
26

🌡️ Water Parameters & Tolerance

Salinity Range
30–40ppt

📊 Population Risk & Fisheries

Population Resilience
High
Minimum doubling time
Fishing Vulnerability
24.00/100
Low vulnerability
Trophic Level
3
Predator
Body Shape
Short and / or deep
Climate Zone
Tropical
Described By
Allen & Erdmann, 2005

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