Ha Long Thryssa

📖 Overview

Ha Long Thryssa (Thrissina belvedere) is a ray-finned fish. It inhabits marine (saltwater) waters in pelagic environments. This species can reach a maximum total length of 8.1 cm. With a trophic level of 3.3, it is a low-level carnivore, feeding on invertebrates and small organisms. It is assessed as Data Deficient on the IUCN Red List.

🔬 Taxonomy

🐟 Physical Description

This species is distinguished by the following set of characters: upper jaw is short, its posterior tip does not reaching posterior margin of preopercle; first supramaxilla is long, narrow; dorsal fin with 10-11 (modally 10) branched rays; anal fin, 24-27 (25) branched rays; pectoral fin, 11-12 (11) branched rays; transverse scales 8-9; scale rows in longitudinal series 33-35 (34); gill rakers on first gill arch, upper series 27-32 (27), lower series 32-35 (33), total 59-66 (59); gill rakers on second gill arch, upper series 21-24 (21), lower series 32-35 (33), total 53-59 (54); gill rakers on third gill arch, upper series 15-18 (16), lower series 17-19 (18), total 33-37 (33); gill rakers on fourth gill arch, upper series 11-14 (13), lower series 13-15 (14), total 25-29 (27); gill rakers on posterior face of third gill arch 7-10 (8) ; body is deep, its depth 25.6-27.9% (mean 27.0%) SL; distance between the origins of dorsal and anal fins is rather long, 29.6-31.7% (30.5%) SL; caudal peduncle also rather long, its length 8.0-9.9% (9.2%) SL and is deep, with depth 10.5-11.7% (11.2%) SL .Cross section: compressed.

🌀 Behaviour

Behavioural data for Ha Long Thryssa is currently being reviewed.

🦐 Diet

🥚 Reproduction

🌍 Habitat & Distribution

Marine; pelagic-neritic. Tropical Northwest Pacific: Vietnam.

🌿 Ecology

📐 Morphometrics

🌡️ Water Parameters & Tolerance

🛡️ Conservation Assessment

📊 Population Risk & Fisheries

🐠 Related Species

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