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Marine Betta (Calloplesiops altivelis)

Find Marine Betta across reef-livestock retailers and from fellow hobbyists on ReefDock. Compare sources, check live pricing where available, and review source-tank parameters on Reef-Trak-verified fish listings before you buy.

Marine Betta
Photo: Emilio J. Rodríguez Posada · CC BY-SA 2.0
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Where to buy Marine Betta

ReefDock searches the following reef retailers for this fish. Click through to see the live price.

  • Saltwaterfish

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    Search Saltwaterfish
  • Amazon

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    Search Amazon
  • Petco

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    Search Petco

About Marine Betta

A small, stocky fish with a dark brown to black body covered in distinctive white spots and bands. The head is large and rounded with a small mouth, and the dorsal and anal fins are elongated, giving it a betta-like appearance.

Key facts

Temperament
Semi Aggressive
Diet Details
Feed small live or frozen foods such as mysis shrimp, copepods, small amphipods, and occasionally small fish. This species prefers frequent small meals and may be reluctant to accept prepared foods initially.
Origin
Indo-Pacific from the Red Sea to the Great Barrier Reef, including Indonesia and the Philippines.
Care Level
Moderate
Aka
Comet, Comet Grouper, Marine Comet
Family
Callioplesidae
Common Health Issues
Marine ich, Fin rot, Swim bladder disorder, Bacterial infections, Parasitic infestations
Max Size
5
Min tank size
30 gallons
Water Parameters
Temperature: 72-78°F pH: 8.1-8.3 Salinity: 1.02-1.025
Appearance
A small, stocky fish with a dark brown to black body covered in distinctive white spots and bands. The head is large and rounded with a small mouth, and the dorsal and anal fins are elongated, giving it a betta-like appearance.
Care Requirements
• Minimum 30-gallon tank; prefers smaller, confined spaces with plenty of hiding spots • Stable water: 72-78°F, pH 8.1-8.3, salinity 1.020-1.025 • Nocturnal predator; provide caves, crevices, and low lighting • Feed meaty foods (mysis, small fish); may ignore pellets • Generally peaceful but will consume small fish and shrimp

Looking for a hobbyist seller?

ReefDock's marketplace lets reef-keepers sell fish directly to other reef-keepers with Stripe-secured checkout and live-arrival photo confirmation. Browse current fish listings on ReefDock, or list your own.

Verify the source tank before you buy

ReefDock is the sister app to Reef Trak. Sellers who maintain a Reef Trak tank log can publish source-tank parameters on eligible fish listings — so you can see the conditions a fish was raised in before you buy. Log this fish on Reef Trak.

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