Riau viviparous brotula

📖 Overview

Riau viviparous brotula (Ungusurculus riauensis), first described by Schwarzhans & Møller, 2007 is a tiny fish. Adults typically reach 4.70 cm in maximum length. It inhabits marine coastal and open-ocean environments. Recorded depth range: 0 to 5 metres. It occurs in Tropical waters. It feeds on a mix of small fish and invertebrates as a mid-level predator. The species largely solitary in behaviour. On the IUCN Red List, it is classified as Data Deficient.

🔬 Taxonomy

🐟 Physical Description

Dorsal soft rays (total): 70 - 77; Anal soft rays: 53 - 61; Vertebrae: 40 - 42. This species is diagnosed by the following characters: D 70-77, A 53-61, D/A 20-23, V in D 1.9-2.2; vertebrae 12+28-30=40-42; anterior nostril 1/4 distance from upper lip to aggregate distance to anterior margin of eye; free pseudoclaspers 2 pairs, the outer pseudoclasper wingshaped with broad base and distally widened supporter with massive anterior hook, prominent knob on inner face of outer pseudoclasper fitting into opening of inner pseudoclasper, the inner one long, massive, stalked, distally with claw-like, outwardly directed strong spines; cheeks with 5 scale rows on upper part and 3 rows on lower; no upper preopercular pore; otolith moderately elongate, its length to height is 2.0-2.2, pointed anterior tip, expanded posterior tip, sharp postdorsal angle, bent outwards, short sulcus with small ventral indentation at joining of ostium and cauda but completely fused colliculi, its centre anterior to centre of otolith, inclined about 10°, otolith length to sulcus length is 2.1 .: elongated; Cross section: compressed.

🌀 Behaviour

Behavioural data for Riau viviparous brotula is currently being reviewed.

🦐 Diet

🥚 Reproduction

🌍 Habitat & Distribution

Marine; reef-associated; depth range 0 - 5 m . Tropical

🌿 Ecology

📐 Morphometrics

🌡️ Water Parameters & Tolerance

🛡️ Conservation Assessment

📊 Population Risk & Fisheries

🐠 Related Species

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