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🌊 Marine Least Concern 🌡️ Tropical

Pycnochromis Abruptus

Pycnochromis abruptus Randall, 2001
Max Length
5.4 cm
Max Weight
Lifespan
Trophic Level
3
Depth
0–22 m
Climate
Tropical
Resilience
High
Vulnerability
14.00/100
Typical Length
Depth Zone
reef

📖 Overview

A shallow water species. Feeds on planktons . Diurnal species . Oviparous, distinct pairing during breeding . Eggs are demersal and adhere to the substrate . Males guard and aerate the eggs .

Scientific Name
Pycnochromis abruptus
Authority
Randall, 2001
Habitat
Marine
Climate
Tropical
Body Shape
Short and / or deep
IUCN Status
LC
Max Length
5.4 cm
Depth Range
0–22 m
Trophic Level
3
Resilience
High
Vulnerability
14.00/100
Salinity
30–40 ppt

🔬 Taxonomy

Genus
Pycnochromis
Pycnochromis
Species
Pycnochromis Abruptus
Pycnochromis abruptus

🐟 Physical Description

Dorsal spines (total): 12; Dorsal soft rays (total): 11 - 13; Anal spines: 2; Anal soft rays: 11 - 12; Vertebrae: 26. Body very dark gray-brown, depth 1.95-2.1 in SL. Caudal fin abruptly white. Narrow posterior part of dorsal and anal fins hyaline. Base of pectoral fins with a large black spot. Upper and lower spiniform procurrent caudal rays 2; upper and lower 2 branched caudal rays filamentous and often very long. Tube lateral line scales 16-18, rarely 16. Free margin of subopercle nearly reaching a vertical at rear margin of pupil.: short and / or deep; Cross section: compressed.

🌀 Behaviour

Behavioural data for Pycnochromis Abruptus is currently being reviewed.

🦐 Diet

Diet information for Pycnochromis Abruptus is currently being compiled.

🥚 Reproduction

🐣 Oviparous
Spawn Location
Demersal

Oviparous, 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 0 - 22 m . Tropical Central Pacific: endemic to Marquesas.

🌿 Ecology

Zone Preferences
🌊 Marine 🪸 Reef Associated
Trophic Level
3±0.2
Food Items

planktons (Ref

📐 Morphometrics

Length–Weight Relationship: W = 0.02089 × L2.98 (TL)
Max TL
5.4cm
Dorsal Spines
12
Dorsal Rays
12
Anal Spines
2
Anal Rays
12
Vertebrae
26

🌡️ Water Parameters & Tolerance

Salinity Range
30–40ppt

🛡️ Conservation Assessment

IUCN Category
Least Concern
Assessment Date
2010

📊 Population Risk & Fisheries

Population Resilience
High
Minimum doubling time
Fishing Vulnerability
14.00/100
Low vulnerability
Trophic Level
3
Predator
Body Shape
Short and / or deep
Climate Zone
Tropical
Described By
Randall, 2001

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