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Scolopsis bilineata, commonly known as the Bridled monocle bream, is a species of marine ray-finned fish belonging to the family Nemipteridae, the threadfin breams. It is characterized by its distinctive color pattern, particularly the two prominent white or yellow stripes on its head and body, which are key identification features. This species is a common inhabitant of coral reefs and adjacent sandy areas throughout its Indo-Pacific range.
Physical Characteristics
- Body shape
- compressed
- Coloration
- The body is generally silvery-white to pale grey, often with a yellowish tinge dorsally. The most striking feature is a prominent white or yellow stripe running from the snout, through the eye, and along the upper flank to the caudal peduncle. Below this, a second, less distinct, white or yellow stripe runs from behind the pectoral fin to the caudal peduncle. The dorsal fin is typically yellowish, and the caudal fin is often yellow with a white margin. Juveniles often exhibit a more pronounced yellow coloration and a black spot on the upper caudal fin lobe, which fades with age.
- Scale type
- ctenoid
- Mouth position
- terminal
- Distinctive features
- Two prominent longitudinal white/yellow stripes on the head and body., A black spot on the upper caudal fin lobe in juveniles, fading in adults., A suborbital spine, characteristic of the genus Scolopsis.
- Dorsal fin
- Single dorsal fin with 10 spines and 9 soft rays. The spinous portion is continuous with the soft-rayed portion.
- Tail fin
- Forked caudal fin, often yellow with a white margin.
- Pectoral fin
- Pectoral fins are relatively long and pointed, typically translucent.
- Distinctive fins
- Pelvic fins are thoracic, located directly below the pectoral fins, with 1 spine and 5 soft rays.
Identification Tips
Body Stripes
Look for the two distinct white or yellow longitudinal stripes. The upper stripe runs from the snout through the eye, and the lower stripe is less distinct, starting behind the pectoral fin.
Juvenile Caudal Spot
Juveniles have a prominent black spot on the upper lobe of the caudal fin, which is a key identifier for younger individuals.
Suborbital Spine
Like all Scolopsis species, it possesses a suborbital spine below the eye, though this may require closer inspection.
Habitat
- Water type
- saltwater
- Depth
- Typically found at depths ranging from 1 to 25 meters, occasionally deeper to 60 meters.
- Environment
- Inhabits coral reefs, rocky reefs, and adjacent sandy or rubble areas. Often found near reef edges, slopes, and lagoons, where it forages over sandy bottoms.
- Geographic range
- Indo-West Pacific: Red Sea and East Africa to Samoa, north to southern Japan, south to northern Australia and New Caledonia.
Aquarium Information
- Care level: intermediate
- Temperament: semi-aggressive
- Diet: carnivore
- Minimum tank size: 75 gallons
- Temperature: 72-78°F (22-26°C)
- pH level: 8.1-8.4
- Hardness: 8-12 dKH
- Compatibility: Generally compatible with other semi-aggressive to peaceful fish of similar size. Avoid very small, timid fish or highly aggressive species. Can be kept singly or in a pair if introduced simultaneously to a sufficiently large tank.
- Special requirements: Requires a well-established aquarium with plenty of live rock for hiding and foraging. A sand bed is beneficial as they often sift through it for food. Good water quality and stable parameters are crucial. May prey on very small invertebrates.
Wild Information
- Conservation status: least concern
- Seasonality: No specific seasonal patterns for availability; caught year-round in its range.
- Market price: Low to moderate
- Commercial importance: low
- Taste: Mild, white flesh
- Texture: Flaky, tender
- Cooking methods: Steaming, Frying, Grilling, Baking
- Nutritional value: Good source of lean protein and omega-3 fatty acids.
Key Facts
Striped Identityinteresting
The 'bilineata' in its scientific name directly refers to the two prominent lines (bi-lineated) on its body, making it easy to identify.
Juvenile Camouflagebehavior
Juvenile Bridled monocle breams often mimic toxic flatworms (e.g., Pseudoceros spp.) by adopting a similar swimming pattern and coloration, providing them protection from predators.
Sand Siftersbehavior
These fish are often observed sifting through sandy substrates with their mouths, searching for small invertebrates, a common feeding strategy among Nemipteridae.
Safety Information
Handle with care- Safety level: caution
- Venomous: No
- Edibility: edible
- Handling notes: While not venomous, like many reef fish, they possess sharp dorsal and anal fin spines that can inflict painful punctures. Handle with care to avoid injury. No specific toxins are associated with their flesh.
Similar Species
Monocle bream
Scolopsis affinis
Scolopsis affinis typically has a more uniform silvery body coloration without the prominent double stripes of S. bilineata. It may have faint yellowish lines, but they are not as distinct or bright as in S. bilineata. S. affinis also lacks the juvenile caudal spot.
Yellowfin monocle bream
Scolopsis taenioptera
Scolopsis taenioptera has a more yellowish body and fins, and while it may have faint stripes, they are not as sharply defined or as white/yellow as those of S. bilineata. The caudal fin of S. taenioptera is typically entirely yellow without the distinct white margin seen in S. bilineata.
Scientific Classification
- Kingdom
- Animalia
- Phylum
- Chordata
- Class
- Actinopterygii
- Order
- Perciformes
- Family
- Nemipteridae
- Genus
- Scolopsis
- Species
- bilineata
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