Grallenia Nigrimarginata

📖 Overview

Grallenia Nigrimarginata (Grallenia nigrimarginata) is a ray-finned fish. It inhabits marine (saltwater) waters in reef-associated environments. This species can reach a maximum total length of 1.2 cm. It occurs at depths between 15 and 25 metres. With a trophic level of 3, it is a low-level carnivore, feeding on invertebrates and small organisms.

🔬 Taxonomy

🐟 Physical Description

Dorsal spines (total): 7; Dorsal soft rays (total): 8 - 10; Anal spines: 1; Anal soft rays: 9 - 10. This species is distinguished from its congeners by the following set of characters: dorsal rays VI + I,8-10 (usually 9); anal rays I,9-10 (usually 9); pectoral rays 15-17 (usually 15, rarely 17); absence of elongate dorsal spines; absence of pelvic frenum; absence of cephalic sensory canals and associated pores; total longitudinal scales 19-26 (mean 22.6), including 3-6 (mean 4.6) scales immediately behind pectoral fin and 15-21 (mean 18) on posterior portion of body; main mass of body scales extending forward from caudal-fin base to about junction between dorsal fins; colour in alcohol pale yellowish and mainly unmarked except four widely spaced; tiny brown spots or horizontally elongate streaks in mid-lateral row on side of body and clusters of melanophores on side and frontal region of head; male clearly distinguished by black margin on anal fin (on both live and preserved fish); and red or orange stripes on dorsal fins of live individuals .: elongated; Cross section: oval.

🌀 Behaviour

Behavioural data for Grallenia Nigrimarginata is currently being reviewed.

🦐 Diet

🥚 Reproduction

🌍 Habitat & Distribution

Marine; reef-associated; depth range 15 - 25 m . Tropical Central Pacific: Indonesia.

🌿 Ecology

📐 Morphometrics

🌡️ Water Parameters & Tolerance

📊 Population Risk & Fisheries

🐠 Related Species

👥 Community & Contribute