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🌊 Marine Least Concern 🌡️ Subtropical

Halfspined flathead

Ratabulus prionotus Sauvage, 1873
Max Length
22 cm
Max Weight
-
Lifespan
-
Trophic Level
3.7
Depth
1–100 m
Climate
Subtropical
Resilience
High
Vulnerability
25.00/100
Typical Length
-
Depth Zone
demersal

📖 Overview

Halfspined flathead (Ratabulus prionotus), first described by Sauvage, 1873 is a medium-sized fish in the family Platycephalidae (order Perciformes). Adults typically reach 22.00 cm in maximum length. It inhabits marine coastal and open-ocean environments. Recorded depth range: 1 to 100 metres. It occurs in Subtropical waters. It feeds on a mix of small fish and invertebrates as a mid-level predator. On the IUCN Red List, it is classified as Least Concern.

Scientific Name
Ratabulus prionotus
Authority
Sauvage, 1873
Habitat
Marine
Climate
Subtropical
Body Shape
Elongated
IUCN Status
LC
Max Length
22 cm
Depth Range
1–100 m
Trophic Level
3.7
Resilience
High
Vulnerability
25.00/100
Salinity
30–40 ppt

🐟 Physical Description

Dorsal spines (total): 9; Dorsal soft rays (total): 12; Anal spines: 0; Anal soft rays: 12 - 13. Brownish in color, with 4-5 bands crossing back; spiny dorsal dusky brown, other fins dark spotted; under opercle flap dark purple with light lines .: elongated.

🌀 Behaviour

Behavioural data for Halfspined flathead 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; demersal; depth range 1 - 100 m . Subtropical Indian Ocean: Red Sea to Delagoa Bay to Karachi.

🌿 Ecology

Zone Preferences
🌊 Marine ⬇️ Benthic
Trophic Level
3.7±0.6

📐 Morphometrics

Length–Weight Relationship: W = 0.00457 × L3.09 (TL)
Max TL
22cm
Dorsal Spines
9
Dorsal Rays
12
Anal Rays
13

🌡️ Water Parameters & Tolerance

Salinity Range
30–40ppt

🛡️ Conservation Assessment

IUCN Category
Least Concern
Assessment Date
2017

📊 Population Risk & Fisheries

Population Resilience
High
Minimum doubling time
Fishing Vulnerability
25.00/100
Low vulnerability
Trophic Level
3.7
Predator
Body Shape
Elongated
Climate Zone
Subtropical
Described By
Sauvage, 1873

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