Spectacled sandgoby

📖 Overview

Spectacled sandgoby (Istigobius diadema), first described by Steindachner, 1876 is a small fish in the family Gobiidae (order Gobiiformes). Adults typically reach 10.00 cm in maximum length. It is diadromous, migrating between freshwater and marine environments during its life cycle. Recorded depth range: 0 to 6 metres. It occurs in Tropical waters. It feeds on a mix of small fish and invertebrates as a mid-level predator.

🔬 Taxonomy

🐟 Physical Description

Dorsal spines (total): 6 - 7; Dorsal soft rays (total): 11 - 12; Anal spines: 1; Anal soft rays: 9 - 10. Characterized by pale grey to brownish body color grading to white on lower half; dark brown scale margins forming honeycomb pattern; presence of narrow dark brown to blackish stripe from rear edge of eye to above base of pectoral fin; dorsal and lower part of caudal fins with dark spotting; fully united pelvic fins with well developed frenum; rounded caudal fin, about equal to head length; longitudinal scale series 32-38; predorsal scales 12-16, reaching interorbital space; ctenoid body scales, becoming cycloid anterior to pectoral and pelvic fins; scales absent on cheek, 1-2 rows on anterodorsal part of operculum; depth of body 4.7-6.4 in SL .: elongated.

🌀 Behaviour

Behavioural data for Spectacled sandgoby is currently being reviewed.

🦐 Diet

🥚 Reproduction

Genital papilla of male sometimes heavily pigmented, reaching anal spine. Genital papilla of female truncate, ending well short of anal spine.

🌍 Habitat & Distribution

Marine; freshwater; brackish; benthopelagic; amphidromous ; depth range 0 - 6 m . Tropical

🌿 Ecology

📐 Morphometrics

🌡️ Water Parameters & Tolerance

📊 Population Risk & Fisheries

🐠 Related Species

🔍 Similar Species

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