Got a photo? Identify fish instantly with the Fishby app.
Open the appDescription
The Sailfin Snapper (Symphorichthys spilurus) is a striking and distinctive species of marine fish belonging to the family Lutjanidae, though it is often placed in the family Nemipteridae by some classifications due to its morphological similarities to threadfin breams. It is renowned for its elongated dorsal and anal fins, especially in juveniles, which resemble sails, giving it its common name. This species exhibits a vibrant coloration and a unique pattern of blue lines and spots, making it a highly sought-after fish in the aquarium trade and a captivating sight in its natural coral reef habitat. It is a solitary or small-group dwelling fish, typically found in sandy areas adjacent to coral reefs.
Physical Characteristics
- Body shape
- compressed
- Coloration
- Adults typically have a yellowish-orange body with numerous iridescent blue horizontal lines along the flanks. A prominent black spot is present on the caudal peduncle, often surrounded by a white or yellow ring. The fins are generally yellow, with the dorsal and anal fins having blue margins. Juveniles are more intensely yellow with fewer, broader blue stripes and exceptionally elongated dorsal and anal fin rays.
- Scale type
- ctenoid
- Mouth position
- terminal
- Distinctive features
- Extremely elongated dorsal and anal fin rays, especially in juveniles, forming a 'sail-like' appearance., Vibrant yellow-orange body with numerous iridescent blue horizontal lines., Prominent black spot on the caudal peduncle., Large eyes relative to head size., Terminal mouth with small, conical teeth.
- Dorsal fin
- Single dorsal fin, deeply notched, with 10 spines and 18-19 soft rays. The anterior soft rays are greatly elongated, particularly in juveniles.
- Tail fin
- Forked caudal fin, yellow with blue margins.
- Pectoral fin
- Long and pointed pectoral fins, typically yellow.
- Distinctive fins
- Pelvic fins are also elongated, especially in juveniles, and are yellow with blue margins. Anal fin has 3 spines and 14-15 soft rays, with the anterior soft rays also elongated.
Identification Tips
Fin Elongation
Look for the exceptionally long, 'sail-like' dorsal and anal fin rays, especially pronounced in younger individuals. This is the most distinguishing feature.
Coloration and Pattern
Observe the bright yellow-orange body with numerous thin, iridescent blue horizontal lines. The black spot on the caudal peduncle is also a key identifier.
Habitat
Typically found over sandy or rubble areas near coral reefs, which helps differentiate it from some reef-dwelling snappers.
Habitat
- Water type
- saltwater
- Depth
- Typically found at depths of 5 to 60 meters (16 to 197 feet), though occasionally deeper.
- Environment
- Prefers sandy bottoms adjacent to coral reefs, rubble zones, and seagrass beds. Juveniles are often found in shallower, more protected areas.
- Geographic range
- Indo-Pacific region, from the Andaman Sea and Western Australia to Samoa, north to the Ryukyu Islands, and south to New Caledonia. Common in the Philippines, Indonesia, and Papua New Guinea.
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: Best kept as a single specimen or in a very large tank with other large, semi-aggressive fish. Avoid keeping with smaller, docile fish or invertebrates that it might prey upon. Can be aggressive towards conspecifics unless the tank is exceptionally large.
- Special requirements: Requires a large tank with ample swimming space and a deep sand bed for burrowing, especially when startled or sleeping. Excellent water quality and strong filtration are essential. Provide plenty of rockwork for hiding spots. Juveniles are more tolerant of smaller tanks but will quickly outgrow them. Diet should be varied and include meaty foods.
Wild Information
- Conservation status: least concern
- Seasonality: No specific seasonal patterns for reproduction or migration are widely documented; present year-round in its range.
- Market price: Moderate to high (aquarium trade), low (food fish)
- Commercial importance: low
- Taste: Mild, white flesh
- Texture: Flaky, firm
- Cooking methods: Baked, Grilled, Steamed, Fried
- Nutritional value: Good source of protein and omega-3 fatty acids.
Key Facts
Juvenile Transformationbehavior
Juvenile Sailfin Snappers possess exceptionally long, flowing dorsal and anal fins that gradually shorten and become less prominent as the fish matures into an adult.
Sand Dwellerbehavior
This species is known to quickly dive and bury itself in sandy substrates when threatened or for sleeping, a behavior common among some nemipterids.
Taxonomic Debateinteresting
Despite its common name 'snapper' and initial classification within Lutjanidae, some ichthyologists place Symphorichthys spilurus within the family Nemipteridae (threadfin breams) due to shared morphological characteristics and genetic studies.
Aquarium Geminteresting
Due to its stunning coloration and unique finnage, the Sailfin Snapper is a highly prized, albeit challenging, species for advanced marine aquarists.
Safety Information
Safe- Safety level: safe
- Venomous: No
- Edibility: edible
- Handling notes: No known venomous spines or toxic properties. Handle with care to avoid fin pricks, as with any fish. Can be skittish and may attempt to burrow into sand if stressed.
Similar Species
Emperor Snapper
Lutjanus sebae
While also having elongated fins as juveniles, L. sebae has a distinct reddish-pink body with three broad, dark red bands. Its body shape is generally deeper and more robust, and it lacks the numerous blue lines of S. spilurus.
Threadfin Bream
Nemipterus spp.
Some threadfin breams have elongated caudal fin rays, but none possess the dramatically elongated dorsal and anal fin rays of S. spilurus. Their coloration and body patterns are also distinctly different, typically lacking the vibrant blue lines and caudal spot.
Scientific Classification
- Kingdom
- Animalia
- Phylum
- Chordata
- Class
- Actinopterygii
- Order
- Perciformes
- Family
- Lutjanidae (or Nemipteridae by some classifications)
- Genus
- Symphorichthys
- Species
- Symphorichthys spilurus
Explore Sailfin Snapper
Identify fish anywhere
Free on iOS, Android, and Web. Photo identification, full species details, and more.