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The Spotty-bellied wrasse (Halichoeres tenuispinis) is a small, colorful wrasse species belonging to the family Labridae. It is characterized by its elongated body, distinctive coloration, and often exhibits sexual dimorphism, with males and females displaying different patterns and hues. This species is a common inhabitant of coral reefs and rocky substrates in the Indo-Pacific region, playing an ecological role as a benthic invertebrate feeder.
Physical Characteristics
- Body shape
- elongated
- Coloration
- Males typically display a greenish-blue body with irregular reddish-orange spots and lines, particularly on the head and anterior body. A prominent black spot is often present on the dorsal fin. The belly can be whitish with small, scattered dark spots, giving it its common name. Females and juveniles are generally duller, often yellowish-brown to reddish-brown with less distinct markings, sometimes with a series of dark spots along the lateral line and a dark spot on the caudal peduncle. Coloration can vary geographically and with mood.
- Scale type
- cycloid
- Mouth position
- terminal
- Distinctive features
- Elongated body typical of Halichoeres wrasses, Distinctive spot patterns on the belly (more pronounced in some individuals/sexes), Sexual dimorphism in coloration and patterning, Small, pointed snout
- Dorsal fin
- Single, long dorsal fin with 9 spines and 11-12 soft rays. Often features a prominent black spot in males.
- Tail fin
- Rounded to slightly truncate caudal fin.
- Pectoral fin
- Well-developed pectoral fins, typically clear or slightly yellowish.
- Distinctive fins
- Pelvic fins are relatively small.
Identification Tips
Body Shape
Look for the characteristic elongated, torpedo-shaped body of a wrasse.
Coloration (Males)
Observe for greenish-blue body with reddish-orange spots and lines, especially on the head, and a black spot on the dorsal fin. The 'spotty belly' may be visible.
Coloration (Females/Juveniles)
Note the duller yellowish-brown to reddish-brown coloration, often with less distinct markings, and sometimes a series of dark spots along the lateral line.
Behavior
Watch for its characteristic wrasse swimming pattern and its habit of burrowing into the sand at night or when threatened.
Habitat
- Water type
- saltwater
- Depth
- Typically found in depths ranging from 1 to 30 meters (3 to 100 feet).
- Environment
- Inhabits coral reefs, rocky reefs, and rubble zones, often in areas with sandy patches where they can burrow. They prefer areas with a mix of open sand and reef structure for foraging and refuge.
- Geographic range
- Indo-Pacific region, including the Western Pacific from southern Japan, Taiwan, and the Ryukyu Islands south to the Philippines, Indonesia, and parts of Australia. Also found in the Indian Ocean, though less commonly documented.
Aquarium Information
- Care level: intermediate
- Temperament: peaceful
- Diet: carnivore
- Minimum tank size: 50 gallons
- Temperature: 72-78°F (22-26°C)
- pH level: 8.1-8.4
- Hardness: 8-12 dKH
- Compatibility: Generally compatible with other peaceful reef-safe fish. Avoid keeping with aggressive species or very small, timid fish that might be outcompeted for food. Can be kept in pairs or small groups if introduced simultaneously to a sufficiently large tank.
- Special requirements: Requires a sand bed of at least 2-3 inches for burrowing at night or when startled. Ample live rock for hiding and foraging is also essential. A tight-fitting lid is necessary as wrasses are known jumpers.
Wild Information
- Conservation status: least concern
- Seasonality: Breeding typically occurs during warmer months, but specific seasonal patterns for this species are not extensively documented. They are active year-round within their tropical range.
- Market price: Moderate
- Commercial importance: low
- Taste: Not typically consumed due to small size and reef association.
- Texture: Not typically consumed.
- Nutritional value: Not typically consumed.
Key Facts
Sand Dwellerbehavior
The Spotty-bellied wrasse is known for its habit of burying itself in the sand at night or when it feels threatened, a common behavior among many Halichoeres species.
Protogynous Hermaphroditeevolution
Like many wrasses, Halichoeres tenuispinis is a protogynous hermaphrodite, meaning individuals are born as females and can later change sex to become males.
Benthic Foragerbehavior
This wrasse actively forages on the seabed, preying on small benthic invertebrates such as crustaceans, mollusks, and worms, playing a role in controlling these populations.
Color Variationinteresting
The coloration of Halichoeres tenuispinis can vary significantly between sexes, age, and even geographical locations, making identification sometimes challenging without careful observation.
Safety Information
Safe- Safety level: safe
- Venomous: No
- Edibility: not recommended
- Handling notes: No specific handling precautions are required beyond standard fish handling practices to minimize stress to the fish. They are not venomous and do not possess sharp spines that pose a significant threat.
Similar Species
Checkerboard Wrasse
Halichoeres hortulanus
H. hortulanus is generally larger and has a more distinct checkerboard pattern on its body, particularly on the posterior half, and a prominent black spot on the anterior dorsal fin, but lacks the reddish-orange markings and 'spotty belly' of H. tenuispinis.
Yellow-striped Wrasse
Halichoeres chrysus
H. chrysus is predominantly bright yellow with horizontal blue stripes, lacking the complex spot and line patterns and the 'spotty belly' of H. tenuispinis.
Adorned Wrasse
Halichoeres cosmetus
H. cosmetus has a more intricate pattern of blue and orange lines and spots, but typically lacks the distinct 'spotty belly' and the overall greenish-blue base coloration of male H. tenuispinis.
Scientific Classification
- Kingdom
- Animalia
- Phylum
- Chordata
- Class
- Actinopterygii
- Order
- Perciformes
- Family
- Labridae
- Genus
- Halichoeres
- Species
- tenuispinis
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