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🌊 Marine 🌡️ Tropical

Chromis Oligactis

Chromis oligactis Prokofiev & Astakhov, 2023
Max Length
7.9 cm
Max Weight
-
Lifespan
-
Trophic Level
3
Depth
30–40 m
Climate
Tropical
Resilience
High
Vulnerability
21.00/100
Typical Length
-
Depth Zone
reef

📖 Overview

Chromis Oligactis (Chromis oligactis) 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 7.9 cm. It occurs at depths between 30 and 40 metres. With a trophic level of 3, it is a low-level carnivore, feeding on invertebrates and small organisms.

Scientific Name
Chromis oligactis
Authority
Prokofiev & Astakhov, 2023
Habitat
Marine
Climate
Tropical
Body Shape
Short and / or deep
Max Length
7.9 cm
Depth Range
30–40 m
Trophic Level
3
Resilience
High
Vulnerability
21.00/100
Migration
Non-migratory
Salinity
30–40 ppt

🐟 Physical Description

Dorsal spines (total): 14; Dorsal soft rays (total): 10; Anal spines: 2; Anal soft rays: 10; Vertebrae: 26. This species is distinguished from its congeners by the following set of characters: 14 spinous rays in D, 10 branched rays in D and A, 16-17 rays in P; 3 spiniform procurrent rays in the upper and lower lobe of C; 26 gill-rakers in the outer row on the first arch; 19 perforated scales in the anterior lateral line; maximum body depth, which fits 2.2 times in SL; a small dark spot at the base of P, without prominent light or black areas or a contrasting pattern on the body in preserved specimens .: short and / or deep; Cross section: compressed.

🌀 Behaviour

Behavioural data for Chromis Oligactis 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; non-migratory; depth range 30 - 40 m . Tropical Central Pacific: Vietnam.

🌿 Ecology

Zone Preferences
🌊 Marine 🪸 Reef Associated
Migration
Non-migratory
Trophic Level
3±0.1

📐 Morphometrics

Length–Weight Relationship: W = 0.0182 × L3 (TL)
Max TL
7.9cm
Dorsal Spines
14
Dorsal Rays
10
Anal Spines
2
Anal Rays
10
Vertebrae
26

🌡️ Water Parameters & Tolerance

Salinity Range
30–40ppt

📊 Population Risk & Fisheries

Population Resilience
High
Minimum doubling time
Fishing Vulnerability
21.00/100
Low vulnerability
Trophic Level
3
Predator
Body Shape
Short and / or deep
Climate Zone
Tropical
Described By
Prokofiev & Astakhov, 2023

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