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Siganus corallinus, commonly known as the Goldspotted Spinefoot or Coral Rabbitfish, is a species of marine ray-finned fish belonging to the family Siganidae. These fish are characterized by their vibrant coloration and the presence of venomous spines. They are primarily herbivorous, playing a significant role in coral reef ecosystems by grazing on algae.
Physical Characteristics
- Body shape
- compressed
- Coloration
- Bright yellow to orange-brown body, densely covered with numerous small, iridescent blue or gold spots. The spots are typically more prominent on the head and anterior part of the body. The fins are generally yellow, often with a bluish tint on the dorsal and anal fins. Juveniles are often a more intense yellow.
- Scale type
- ctenoid
- Mouth position
- terminal
- Distinctive features
- Small, round, iridescent blue or gold spots covering the entire body., A small, rabbit-like mouth with incisor-like teeth., Venomous spines in the dorsal, anal, and pelvic fins.
- Dorsal fin
- 13 spines, 10 soft rays. The spines are venomous.
- Tail fin
- Slightly forked to emarginate.
- Pectoral fin
- 16-17 rays.
- Distinctive fins
- Pelvic fins have 1 spine and 3 soft rays, flanked by another spine (I,3,I formula), which is characteristic of the Siganidae family and venomous.
Identification Tips
Coloration and Spotting
The most distinguishing feature is the bright yellow to orange-brown body covered with numerous small, iridescent blue or gold spots. The intensity and color of the spots can vary slightly.
Body Shape
Laterally compressed, oval-shaped body, typical of rabbitfishes.
Fin Spines
Presence of strong, venomous spines in the dorsal, anal, and pelvic fins. The pelvic fin formula (I,3,I) is unique to rabbitfishes.
Mouth
Small, terminal mouth with a single row of incisor-like teeth, adapted for grazing algae.
Habitat
- Water type
- saltwater
- Depth
- Typically found in shallow waters from 1 to 30 meters (3 to 98 feet), occasionally deeper.
- Environment
- Associated with coral reefs, rocky reefs, and seagrass beds. Juveniles often inhabit shallow, protected lagoons and estuaries, while adults are more commonly found on outer reef slopes and channels.
- Geographic range
- Indo-Pacific region, from the Andaman Sea and Western Australia to the Solomon Islands, north to southern Japan, and south to New Caledonia. Absent from the Red Sea and Persian Gulf.
Aquarium Information
- Care level: intermediate
- Temperament: peaceful
- Diet: herbivore
- Minimum tank size: 180 gallons (680 liters)
- Temperature: 23-28°C (73-82°F)
- pH level: 8.1-8.4
- Hardness: 8-12 dKH
- Compatibility: Generally peaceful with other fish, but can be territorial towards conspecifics or similar-looking species in smaller tanks. Best kept singly or in a very large tank as a mated pair.
- Special requirements: Requires a well-established aquarium with ample live rock for grazing and hiding. A varied diet of marine algae, spirulina, and high-quality herbivore pellets is crucial for their health. Good water quality and strong filtration are essential.
Wild Information
- Conservation status: least concern
- Seasonality: No specific seasonal patterns for availability; present year-round in its natural range.
- Market price: Variable, often sold for the aquarium trade and local consumption.
- Commercial importance: medium
- Taste: Mild, white flesh
- Texture: Firm
- Cooking methods: Baked, Grilled, Steamed, Fried
- Nutritional value: Good source of protein and omega-3 fatty acids.
Key Facts
Algae Grazerbehavior
Goldspotted Spinefoot are primarily herbivorous, playing a crucial role in controlling algal growth on coral reefs, which helps maintain the health of the ecosystem.
Venomous Defenseinteresting
Like all rabbitfishes, Siganus corallinus possesses venomous spines as a defense mechanism against predators. The venom is not typically life-threatening to humans but can cause significant pain.
Schooling Behaviorbehavior
Juveniles and sub-adults often form large schools, while adults are typically found singly or in pairs, especially during breeding season.
Color Changebehavior
They can exhibit subtle color changes depending on their mood, environment, or stress levels, often becoming paler or darker.
Safety Information
Venomous- Safety level: venomous
- Venomous: Yes
- Edibility: edible
- Handling notes: All rabbitfish species possess venomous spines in their dorsal, anal, and pelvic fins. A sting can cause intense pain, swelling, and inflammation, which can last for several hours. In rare cases, systemic effects like nausea, dizziness, and respiratory distress can occur. When handling, extreme caution is advised. Use thick gloves or a net to avoid direct contact with the spines. If stung, immerse the affected area in hot water (as hot as can be tolerated without scalding, typically 45-50°C or 113-122°F) for 30-90 minutes to denature the protein-based venom. Seek medical attention if symptoms are severe or persist.
Similar Species
Stellate Rabbitfish
Siganus stellatus
Siganus stellatus has a darker, often brownish body with larger, more irregularly shaped white or pale spots, and typically a dark blotch below the soft dorsal fin. S. corallinus has smaller, more uniformly distributed blue/gold spots on a brighter yellow/orange body.
Blue-spotted Rabbitfish
Siganus canaliculatus
Siganus canaliculatus is generally a duller, mottled greenish-brown to grey, with smaller, less distinct spots or a reticulated pattern, and lacks the vibrant yellow base color of S. corallinus.
Scientific Classification
- Kingdom
- Animalia
- Phylum
- Chordata
- Class
- Actinopterygii
- Order
- Acanthuriformes
- Family
- Siganidae
- Genus
- Siganus
- Species
- Siganus corallinus
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