The Colin’s Angelfish otherwise called Cocos Keeling Angelfish is one of the dwarf Angelfish species measuring up to 3’’ (7.62cm). They have a yellow body coloration with the upper quarter part decorated with bright blue coloration including the dorsal fin.
Quick stats – Colin’s Angelfish
|Max size||3” / 7.6 cm|
|Aquarium||Min 100 gallon / 380 liters|
|Water|| 72-79° F / 23-27° C|
dKH 8-12, pH 8.1-8.5
Colin’s Angelfish in the natural habitat
They are native to the reef environment of the Indo-West Pacific Ocean, spanning through Cocos (Keeling) Island giving rise to its naming. They are also found in Fiji of the South Pacific.
They are rare species that are often found hidden within the rocks and rubble on reef top-offs and would usually move in harem of 3-7 fish including a male and several females.
They exhibit sequential hermaphroditism where the dominant female becomes a male in the absence of a male in the group.
Colin’s Angelfish in the ideal aquarium
Setting up the best aquarium for Colin’s Angelfish will require a well filtered tank of 100 gallon/378.5 litres or larger within the minimum requirements of a saltwater tank having 23-27˚C (72.0-78.0F), pH 8.1-8.54, 8-12 dKH, 1020-1.025 sg.
A lot of live rock work should be provided with hiding places to mimic their natural habitat. These live rocks should also encourage algae growth for grazing.
They can adapt to an increased lighting, but it is better to keep them in their preferred dim lighted tank.
They are suitably housed alone, but if they should be added with other species, then they should be added first before introducing other peaceful species alike.
Colin’s Angelfish are unsuitable with corals as they can nip and damage them, but if it must be introduced, they should be closely monitored with caution.
Colin’s Angelfish feeding
As rare species they are seldom found in pet shops and fish stores and are recommended only for expert fish keepers.