Sanaga pygmy herring

📖 Overview

A riverine species, collected only at dusk and dawn in swiftly flowing water of about 1 m just above the hydro-electric dam at Edea, Cameroon . It feeds on plankton and some terrestrial insects .

🔬 Taxonomy

🐟 Physical Description

Dorsal spines (total): 0; Dorsal soft rays (total): 14 - 16; Anal spines: 0; Anal soft rays: 23 - 25; Vertebrae: 45 - 47. Diagnosis: Small and slender or moderately deep-bodied fishes, its depth 20-28% of standard length, perhaps not reaching much over 2 cm standard length; belly rounded, pre-pelvic scutes 4-7, with lateral arms, but without keels; pelvic scute with 2 or 3 lateral arms; post-pelvic scutes 3-5, keeled and with arms; posterior supra-maxilla absent; lower gillrakers 10-12; pelvic insertion well before dorsal fin, with 1 unbranched and 6-7 branched finrays; anal fin beginning under dorsal fin base . The presence of scutes distinguishes Thrattidion noctivagus from Congothrissa gossei and the absence of a posterior supra-maxilla distinguishes it from all other West or Central African pellonulines . : fusiform / normal; Cross section: oval.

🌀 Behaviour

Behavioural data for Sanaga pygmy herring is currently being reviewed.

🦐 Diet

Diet information for Sanaga pygmy herring is currently being compiled.

🥚 Reproduction

Reproduction data for Sanaga pygmy herring is currently being compiled.

🌍 Habitat & Distribution

Freshwater; pelagic. Tropical; 6°N - 3°N

🌿 Ecology

📐 Morphometrics

🌡️ Water Parameters & Tolerance

🛡️ Conservation Assessment

📊 Population Risk & Fisheries

🌐 Names & Taxonomy

🔍 Similar Species

🗺️ Global Occurrence Map

Occurrence records from the Global Biodiversity Information Facility (GBIF) - 1 records indexed .

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