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🌊 Marine Data Deficient 🌡️ Tropical

Humphead thryssa

Thryssa polybranchialis Wongratana, 1983
Max Length
19.1 cm
Max Weight
-
Lifespan
-
Trophic Level
3.4
Depth
-
Climate
Tropical
Resilience
High
Vulnerability
21.00/100
Typical Length
-
Depth Zone
pelagic

📖 Overview

Humphead thryssa (Thryssa polybranchialis) is a ray-finned fish of the family Engraulidae. It inhabits marine (saltwater) waters in pelagic environments. This species can reach a maximum total length of 19.1 cm. With a trophic level of 3.4, it is a low-level carnivore, feeding on invertebrates and small organisms. It is assessed as Data Deficient on the IUCN Red List.

Scientific Name
Thryssa polybranchialis
Authority
Wongratana, 1983
Habitat
Marine
Climate
Tropical
Body Shape
Elongated
IUCN Status
DD
Max Length
19.1 cm
Trophic Level
3.4
Resilience
High
Vulnerability
21.00/100
Salinity
30–40 ppt

🐟 Physical Description

Dorsal spines (total): 0; Anal spines: 0; Anal soft rays: 35 - 39. Belly with 15 to 17 + 9 or 10 = 25 to 27 keeled scutes from isthmus to anus. A distinct hump at nape; tip of snout above upper rim of eye. Maxilla short, not quite or only just reaching to edge of gill cover; first supra-maxilla minute, oval. A dark blotch behind upper part of gill opening.: elongated; Cross section: compressed.

🌀 Behaviour

Behavioural data for Humphead thryssa is currently being reviewed.

🦐 Diet

Diet information for Humphead thryssa is currently being compiled.

🥚 Reproduction

Reproduction data for Humphead thryssa is currently being compiled.

🌍 Habitat & Distribution

Marine; pelagic-neritic. Tropical; 21°N - 4°N, 69°E - 90°E Indian Ocean: eastern and western coasts of India.

🌿 Ecology

Zone Preferences
🌊 Marine 🐟 Pelagic
Trophic Level
3.4±0.5
🐠 Schooling

📐 Morphometrics

Length–Weight Relationship: W = 0.00437 × L3.11 (TL)
Max TL
19.1cm
Anal Rays
37

🌡️ Water Parameters & Tolerance

Salinity Range
30–40ppt

🛡️ Conservation Assessment

IUCN Category
Data Deficient
Assessment Date
2018

📊 Population Risk & Fisheries

Population Resilience
High
Minimum doubling time
Fishing Vulnerability
21.00/100
Low vulnerability
Trophic Level
3.4
Predator
Body Shape
Elongated
Climate Zone
Tropical
Described By
Wongratana, 1983

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