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Gnathodentex aurolineatus, commonly known as the Striped large-eye bream, is a species of marine ray-finned fish belonging to the family Lethrinidae, the emperor and large-eye bream family. It is a moderately sized fish characterized by its distinctive golden-yellow stripes along its body and relatively large eyes. This species is a common inhabitant of coral reefs and rocky bottoms throughout its Indo-Pacific range, playing an important ecological role as a benthic invertebrate feeder. It is also of commercial importance in many regions.
Physical Characteristics
- Body shape
- compressed
- Coloration
- The body is silvery-grey to yellowish-brown dorsally, fading to white ventrally. The most striking feature is the presence of 4-6 prominent golden-yellow to orange longitudinal stripes running along the flanks, often becoming more distinct posteriorly. The fins are typically yellowish, and there is often a reddish blotch on the operculum. The iris is often golden.
- Scale type
- ctenoid
- Mouth position
- terminal
- Distinctive features
- Large eyes, particularly noticeable in relation to its head size., Prominent golden-yellow longitudinal stripes on the body., A small, dark spot often present at the base of the pectoral fin., A relatively deep body, compressed laterally.
- Dorsal fin
- Single dorsal fin with 10 spines and 10 soft rays. The spinous portion is continuous with the soft-rayed portion.
- Tail fin
- Moderately forked caudal fin with pointed lobes.
- Pectoral fin
- Long and pointed pectoral fins.
- Distinctive fins
- Pelvic fins are relatively short, originating just behind the pectoral fin base.
Identification Tips
Body Stripes
Look for the characteristic 4-6 golden-yellow longitudinal stripes on the body. These are usually quite distinct.
Eye Size
Note the relatively large eyes, which are a key feature of the 'large-eye bream' group.
Pectoral Fin Spot
Check for a small, dark spot at the base of the pectoral fin, though this can sometimes be faint or absent.
Fin Coloration
The fins are typically yellowish, which can help distinguish it from other silvery reef fish.
Habitat
- Water type
- saltwater
- Depth
- Typically found at depths ranging from 5 to 100 meters (16 to 328 feet), though occasionally deeper.
- Environment
- Inhabits coral reefs, rocky bottoms, and rubble areas. Often found in clear, coastal waters, frequently forming schools near drop-offs and reef slopes. Juveniles may be found in shallower protected areas.
- Geographic range
- Widespread throughout the Indo-Pacific region, from the Red Sea and East Africa eastward to the Line Islands and Tuamotu Archipelago, north to southern Japan, and south to Australia (Queensland and Western Australia) and New Caledonia.
Aquarium Information
- Care level: advanced
- Temperament: semi-aggressive
- Diet: carnivore
- Minimum tank size: 250 gallons
- Temperature: 24-28°C (75-82°F)
- pH level: 8.1-8.4
- Hardness: 8-12 dKH
- Compatibility: Can be kept with other large, robust fish. Avoid keeping with very small or timid species. May be aggressive towards conspecifics in smaller tanks.
- Special requirements: Requires a large tank with plenty of swimming space and rockwork for shelter. A varied diet of meaty foods is essential. Good filtration and stable water parameters are crucial.
Wild Information
- Conservation status: least concern
- Seasonality: No specific seasonal patterns for availability; caught year-round in its range, though local regulations may apply.
- Market price: Varies by region and size, generally moderate to high.
- Commercial importance: medium
- Taste: Mild, sweet, and delicate
- Texture: Flaky and firm
- Cooking methods: Grilling, Baking, Steaming, Frying
- Nutritional value: Good source of lean protein, Omega-3 fatty acids, and essential vitamins and minerals.
Key Facts
Nocturnal Foragerbehavior
While often seen schooling during the day, Gnathodentex aurolineatus is primarily a nocturnal feeder, using its large eyes to hunt for benthic invertebrates in low light conditions.
Schooling Behaviorbehavior
Adults often form large schools, sometimes numbering in the hundreds, which can be a spectacular sight on coral reefs.
Dietary Preferencebehavior
Its diet consists mainly of small crustaceans, mollusks, echinoderms, and other benthic invertebrates, which it extracts from the substrate.
Reef Health Indicatorinteresting
As a common reef inhabitant and a consumer of benthic invertebrates, its presence and abundance can be an indicator of healthy reef ecosystems.
Safety Information
Safe- Safety level: safe
- Venomous: No
- Edibility: edible
- Handling notes: No specific handling precautions beyond standard care for live fish. When caught for consumption, handle carefully to avoid fin spines, which can cause minor punctures.
Similar Species
Yellowfin emperor
Lethrinus erythracanthus
While also having yellowish fins, L. erythracanthus lacks the distinct golden longitudinal stripes of Gnathodentex aurolineatus and typically has a more uniform body coloration, often with irregular darker blotches.
Spangled emperor
Lethrinus nebulosus
L. nebulosus has a more mottled or spotted pattern on its body, lacking the clear golden stripes. Its eyes are also proportionally smaller than those of Gnathodentex aurolineatus.
Redgill emperor
Lethrinus rubrioperculatus
This species has a reddish opercular margin (gill cover) and often a reddish tinge to its body, but it does not possess the prominent golden longitudinal stripes characteristic of Gnathodentex aurolineatus.
Scientific Classification
- Kingdom
- Animalia
- Phylum
- Chordata
- Class
- Actinopterygii
- Order
- Spariformes
- Family
- Lethrinidae
- Genus
- Gnathodentex
- Species
- aurolineatus
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