Dark-margined flagtail
📖 Overview
Primarily a freshwater species; extent of penetration into brackish and marine environments uncertain . Has been found in moderately deep (1.5-3 m), rocky, unshaded, flowing water areas of mid-hill rivers .
🔬 Taxonomy
🐟 Physical Description
Dorsal spines (total): 10; Dorsal soft rays (total): 10 - 12; Anal spines: 3; Anal soft rays: 11 - 12. Preorbital serrae 18-28; a few fine serrae may be present on suborbital; body depth 2.7-3.05 in SL; orbit diameter 2.75-3.3 in head length; maxilla extending to or slightly beyond a vertical at front edge of pupil; caudal concavity 2.5-3.1 in head length. Silvery, usually with blackish spots posteriorly on dorsal part of body that tends to merge to form bands anteriorly (or the dark pigment is concentrated on scale margins); most of snout and tip of chin blackish; caudal fin pale with a black posterior margin that broadens on lobe tips, then a very broad submarginal pale zone, often preceded by a chevron-shaped blackish band or row of blackish spots parallel with posterior margin; base of caudal fin with small blackish spots; a narrow white margin on soft portion of dorsal and anal fins with a broad blackish submarginal zone anteriorly that narrows posteriorly (broader in dorsal fin than anal) .: fusiform / normal.
🌀 Behaviour
Behavioural data for Dark-margined flagtail is currently being reviewed.
🦐 Diet
Diet information for Dark-margined flagtail is currently being compiled.
🥚 Reproduction
Reproduction data for Dark-margined flagtail is currently being compiled.
🌍 Habitat & Distribution
Freshwater; brackish; demersal; catadromous ; depth range ? - 2 m . Tropical; 32°N - 28°S
🌿 Ecology
📐 Morphometrics
🛡️ Conservation Assessment
📊 Population Risk & Fisheries
🍽️ Edibility & Flavour
"Dark-margined flagtail is an edible species."
- Clear, bright eyes — cloudy eyes indicate age
- Firm flesh that springs back when pressed
- Fresh ocean smell, never strong or ammonia-like
- Bright red or pink gills, not grey or brown
- Shiny, moist skin with scales tightly attached
- Cloudy or sunken eyes
- Strong fishy or ammonia odour
- Soft, mushy flesh that doesn't spring back
- Discoloured or dry flesh
⚡ Nutrition
Detailed nutritional data for Dark-margined flagtail is currently being compiled from USDA FoodData Central.
🔬 Mercury Safety
Mercury data for Dark-margined flagtail has not yet been assigned. Please consult FDA/EPA guidance for general seafood safety advice.
🌿 Sustainability
🌐 Names & Taxonomy
| Language | Common Names |
|---|---|
| 🇬🇧English | Silver Flagtail · Spotted Flagtail |
| 🇫🇷French | Doule à queue rouge · Kuhlie marginée |
| 🇯🇵Japanese | Yugoi · ユゴイ |
🔍 Similar Species
🗺️ Global Occurrence Map
Occurrence records from the Global Biodiversity Information Facility (GBIF) - 42 records indexed .
👥 Community & Contribute
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