More info
Datasheet
| Minimum Tank Size | 600 litres / 158.50 US gallons |
| Maximum Size | 18.0cm / 7.09inches |
| Reef Compatible | Often reef safe |
| Temperament | Docile but might be aggressive towards similar species |
| Temperature | 22.2°C / 71.96°F - 25.6°C / 78.08°F |
| Specific Gravity | 1.020-1.025 |
| Carbonate Hardness | 8-12 |
| pH | 8.1-8.4 |
General Description
Chelmon marginalis, commonly known as the Margined coralfish, belongs to the Chaetodontidae family. It is native to the Western Pacific region, specifically found in northern Australia (from Western Australia to the Great Barrier Reef) and Papua New Guinea. Closely resembling Chelmon rostratus, this species is recognized for its attractive patterns and colors, typical of Butterflyfish.
Aquarium Suitability
Margined coralfish are deemed suitable for aquariums but require experienced care due to their specific demands. They are docile but can show aggression towards similar species, so caution is advised when choosing tank mates. It's recommended to introduce them simultaneously as a pair, and they may initially be slow and selective feeders, necessitating a varied diet including live foods for adaptation.
Care and Hardiness
With an average hardiness level, these fish can be kept in an aquarium with a minimum size of 600 liters. They are best housed in a well-established tank with ample micro life like copepods and amphipods for natural feeding. Margined coralfish prefer frequent feeding multiple times a day, especially upon introduction to a new environment.
Reef Suitability
These Butterflyfish species are often considered reef-safe, making them compatible with reef aquarium setups. However, they have been noted to nibble on clam species, including Tridacna, and are known to eat tubeworms.
Aquarium Setup
When setting up an aquarium for Margined coralfish, ensure a stable environment with water conditions including a temperature range of 22.2-25.6°C, a pH of 8.1-8.4, and a specific gravity of 1.020-1.025. Adequate rockwork and hiding spots should be provided to offer security for this shy species.
Behaviour
Margined coralfish are known for their shy and docile nature. They generally ignore other fish and are peaceful but may display aggression towards similar species, particularly if not introduced correctly. They are best kept in pairs or singularly unless as a mated couple.
Feeding and Diet
The recommended diet for Margined coralfish includes larger crustaceans like shrimp and crabs, small crustaceans such as krill and mysis, zooplankton like cyclops and pods, and other invertebrates. Offering live food can aid in their acclimatization to captivity, as they can be slow and selective feeders initially.
Dimorphism
Margined coralfish do not exhibit significant dimorphism, but captive breeding of some species may be possible. It is essential to ensure a varied diet to maintain their health in captivity.
Habitat and Distribution
In their natural habitat, Margined coralfish are found in the waters of northern Australia and Papua New Guinea within the Western Pacific region. They inhabit coral reef environments, feeding on a variety of prey including anemones, tubeworms, and bristleworms.