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Amblygobius phalaena, commonly known as the Banded Goby, is a species of goby native to the Indo-Pacific region. It is a benthic fish typically found in sandy or silty areas near coral reefs, often in association with burrows. This species is known for its distinctive banded coloration and its habit of sifting through sand for food. It plays an ecological role in bioturbation and nutrient cycling within its habitat.
Physical Characteristics
- Body shape
- elongated
- Coloration
- The body is typically whitish to pale tan, adorned with 5-7 prominent dark brown to black vertical bands that extend from the dorsal surface to the ventral side. A dark spot is often present on the upper caudal fin base. The fins are generally translucent with some darker markings.
- Scale type
- ctenoid
- Mouth position
- terminal
- Distinctive features
- 5-7 dark vertical bands on the body, Elongated body shape, Large eyes positioned dorsally, Small, pointed snout, Often seen sifting sand
- Dorsal fin
- Two dorsal fins; the first dorsal fin has 6 spines, and the second dorsal fin has 1 spine and 12-13 soft rays. The first dorsal fin is often taller than the second.
- Tail fin
- Rounded to slightly emarginate caudal fin.
- Pectoral fin
- Pectoral fins are relatively large and rounded, with 17-19 rays.
- Distinctive fins
- Pelvic fins are fused into a disc-like structure, characteristic of gobies, used for perching and adhesion.
Identification Tips
Body Bands
Look for the distinct 5-7 dark vertical bands across its pale body. This is the most defining characteristic.
Habitat
Observe its behavior in sandy or silty areas; it frequently sifts sand through its gills.
Fin Structure
Note the two dorsal fins and the fused pelvic fins forming a disc.
Habitat
- Water type
- saltwater
- Depth
- Typically found in shallow waters from 1 to 20 meters (3 to 65 feet).
- Environment
- Prefers sandy or silty bottoms, often near coral reefs, rubble zones, or seagrass beds. They are known to inhabit burrows, sometimes in association with pistol shrimp (Alpheus spp.).
- Geographic range
- Indo-Pacific region, ranging from East Africa and the Red Sea to Samoa, north to southern Japan, and south to Australia.
Aquarium Information
- Care level: intermediate
- Temperament: peaceful
- Diet: omnivore
- Minimum tank size: 30 gallons
- Temperature: 22-28°C (72-82°F)
- pH level: 8.1-8.4
- Hardness: 8-12 dKH
- Compatibility: Generally compatible with other peaceful reef-safe fish. Avoid highly aggressive or very small, delicate tank mates. Can be kept singly or in mated pairs.
- Special requirements: Requires a sand bed of at least 2-3 inches for burrowing. Provide plenty of live rock for hiding places and a mature aquarium with stable water parameters. Good water quality is essential.
Wild Information
- Conservation status: least concern
- Seasonality: No specific seasonal behavior patterns for reproduction or migration are widely documented; reproduction is likely year-round in tropical waters.
- Market price: Moderate for the aquarium trade
- Commercial importance: low
- Taste: Not typically consumed due to small size and habitat
- Texture: Not typically consumed
- Nutritional value: Not typically consumed
Key Facts
Sand Sifterbehavior
The Banded Goby is an active sand sifter, constantly taking mouthfuls of sand, filtering out detritus and small invertebrates, and expelling the clean sand through its gills. This behavior helps aerate the substrate.
Burrow Dwellerbehavior
These gobies are known to construct and inhabit burrows in sandy substrates, providing them with shelter from predators. They may sometimes share these burrows with symbiotic pistol shrimp.
Ecological Roleinteresting
By sifting sand, Amblygobius phalaena contributes to bioturbation, which is the mixing of sediment by living organisms. This process is important for nutrient cycling and maintaining healthy benthic environments.
Aquarium Cleanerinteresting
In the aquarium hobby, Banded Gobies are valued for their sand-sifting abilities, which help keep the substrate clean and prevent the buildup of detritus.
Safety Information
Safe- Safety level: safe
- Venomous: No
- Edibility: not recommended
- Handling notes: No specific handling precautions are required. They are not venomous and do not possess sharp spines that pose a significant threat. Handle gently if necessary for transfer.
Similar Species
Maiden Goby
Amblygobius rainfordi
A. rainfordi has fewer, broader, and more irregular dark bands, often with a yellowish hue to the body and fins, and typically a more prominent dark spot on the first dorsal fin.
Orange-striped Goby
Amblygobius decussatus
A. decussatus has a more intricate pattern of orange or reddish stripes and spots, rather than distinct dark vertical bands, and often a more pointed snout.
Spotted Goby
Amblygobius nocturnus
A. nocturnus typically has a series of dark spots or blotches along its flanks, rather than prominent vertical bands, and a more subdued overall coloration.
Scientific Classification
- Kingdom
- Animalia
- Phylum
- Chordata
- Class
- Actinopterygii
- Order
- Gobiiformes
- Family
- Gobiidae
- Genus
- Amblygobius
- Species
- phalaena
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