Barred knifejaw
📖 Overview
Barred knifejaw (Oplegnathus fasciatus), first described by Temminck & Schlegel, 1844 is a large fish in the family Oplegnathidae (order Centrarchiformes). Adults typically reach 80.00 cm in maximum length and up to 6.400 kg. It inhabits marine coastal and open-ocean environments. Recorded depth range: 1 to 10 metres. It occurs in Temperate waters. It feeds on a mix of small fish and invertebrates as a mid-level predator. On the IUCN Red List, it is classified as Least Concern.The species is important as a food fish, valued as a game and sport species, and considered a sustainable seafood option under current management. As a member of the Oplegnathidae, it shares life-history and morphological traits with its relatives in the group.
🔬 Taxonomy
🐟 Physical Description
: short and / or deep.
🌀 Behaviour
Behavioural data for Barred knifejaw is currently being reviewed.
🦐 Diet
🥚 Reproduction
🌍 Habitat & Distribution
Marine; reef-associated; depth range 1 - 10 m . Temperate; 41°N - 22°N, 117°E - 154°W Northwest Pacific: Japan, Korea, Taiwan.
🌿 Ecology
📐 Morphometrics
🌡️ Water Parameters & Tolerance
🛡️ Conservation Assessment
📊 Population Risk & Fisheries
🎣 Angling Guide
- medium-heavy 7ft spinning rod
- 30-50 lb braid
- fluorocarbon leader
- grass flats
- oyster bars
- marsh drains
- deeper channel edges
Use barbless hooks, minimise air exposure, and revive fish head-first in current before release.
⚠️ Slot limits protect breeding-size fish. Verify daily bag limits.
🍽️ Edibility & Flavour
"Barred knifejaw 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
Per 100g cooked - Source: USDA FoodData Central
| Nutrient | Amount |
|---|---|
| Protein | 19.4 g |
| Omega-3 (total) | 212 mg |
🔬 Mercury Safety
Mercury data for Barred knifejaw has not yet been assigned. Please consult FDA/EPA guidance for general seafood safety advice.
🌿 Sustainability
🔬 Full Nutritional Profile
Per 100g - Raw, per 100g - Source: USDA FoodData Central templates (generic fish average)
📊 Population Dynamics
| Year | Region | Index | Notes |
|---|---|---|---|
| - | - | - |
🌐 Names & Taxonomy
| Language | Common Names |
|---|---|
| 🇬🇧English | Barred knifejaw · Japanese parrot fish · Rock bream · Striped beakperch · Striped oplegnathid · striped beakfish |
| 🌍CES | hranozub pruhovaný |
| 🇯🇵Japanese | Ishidai · イシダイ |
| 🇰🇷Korean | 돌돔 |
| 🇵🇹Portuguese | Perca-papagaio-listrada |
| 🇷🇺Russian | Полосатый оплегнат |
| 🇪🇸Spanish | Pez perico rayado |
| 🇨🇳Chinese | 條石鯛 · 海膽鯛 · 硬殼仔 · 黑嘴 |
Scientific Synonyms
| Scientific Name | Author | Year | Status |
|---|---|---|---|
| Hoplegnathus fasciatus | Temminck & Schlegel | 1844 | Synonym |
| Hoplognathus fasciatus | Temminck & Schlegel | 1844 | Synonym |
| Scaradon fasciatus | Temminck & Schlegel | 1844 | Synonym |
🔍 Similar Species
🗺️ Global Occurrence Map
Occurrence records from the Global Biodiversity Information Facility (GBIF) - 19 records indexed .
👥 Community & Contribute
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