Grallenia Dimorpha
📖 Overview
Grallenia Dimorpha (Grallenia dimorpha) is a ray-finned fish. It inhabits marine (saltwater) waters in reef-associated environments. This species can reach a maximum total length of 1.5 cm. It occurs at depths between 8 and 18 metres. With a trophic level of 3, it is a low-level carnivore, feeding on invertebrates and small organisms. It is assessed as Least Concern on the IUCN Red List.
🔬 Taxonomy
🐟 Physical Description
Dorsal spines (total): 7; Dorsal soft rays (total): 8 - 11; Anal spines: 1; Anal soft rays: 9 - 11; Vertebrae: 27. This species is distinguished by the following characters: D VI + I,8-11 (usually 10); A I,9-11 (usually10); fully erect first dorsal fin of male differs from female, male fin rectangular with fifth spine longest and female fin triangular with first spine forming elongate filament; no pelvic frenum nor head pores; longitudinal scales 25-30, often continuous from posterior pectoral-fin base to caudal-fin base, but anterior half of body mainly scaleless; body depth at pelvic-fin origin 13.4-15.6% SL; colour of male in life translucent with a mid-lateral row of five widely separated and progressively shorter posteriorly, horizontal, orange-brown lines, each surrounded by yellowish hue and with a faint, narrow, vertical, brown line extending ventrally, forming overall T-shaped marking; dorsal fins with a pair of prominent stripes, the outermost relatively broad and yellow-orange, inner stripe situated just above fin base, narrower and orange-red with black margin; anal fin yellowish with distinctive black margin; caudal fin is yellowish with irregular translucent areas mainly on upper part of basal half; female similar, but fins translucent without both the distinctive stripes on dorsal fins and black margin on anal fin; series of five ovate, progressively smaller, brown blotches along lower side interspersed with brilliant white markings, beginning at pectoral-fin base, continuing to posterior caudal peduncle .: elongated.
🌀 Behaviour
Behavioural data for Grallenia Dimorpha is currently being reviewed.
🦐 Diet
🥚 Reproduction
🌍 Habitat & Distribution
Marine; reef-associated; depth range 8 - 18 m . Tropical
🌿 Ecology
📐 Morphometrics
🌡️ Water Parameters & Tolerance
🛡️ Conservation Assessment
📊 Population Risk & Fisheries
👥 Community & Contribute
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