Species Name: Neopomacentrus cyanomos
Authority: (Bleeker, 1856)
Common Name: Regal Demoiselle
Range: Indo-West Pacific Ocean: Red Sea to the Solomon Islands, north to Southern Japan, and south to Australia.
Size: 3 inches (8 cm)
Natural Environment: Inhabits lagoon patch reefs, reef faces, back reefs, and fore-reef slopes at depths between 15 to about 50 feet (5 – 15 m) where it feeds mainly on zooplankton (copepods, mysis, and shrimp larvae), fish eggs, and algae.
General Husbandry: Occasionally available in the trade, having a greyish body with yellow on the tail, and yellow or white on the rear tip of the dorsal and anal fins.
As with all species in this genus, quite hardy, peaceful, and better maintained in small groups of at least five to seven members. Should be given wide-open swimming areas, as they are open water swimmers almost always in the upper aquarium areas, and non-aggressive tankmates. Should also have hiding places, as they are shy and can be picked on by slightly aggressive tankmates.
As to diet, will eat most regular aquarium foods, e.g., live fortified brine shrimp and/or finely chopped various frozen or fresh meaty foods such as mysis, squid, fish flesh, shrimp, clam, etc., and plant material, e.g., flake foods, especially those containing Spirulina and should be offered several times daily.
FYI: Even though quite passive and will ignore other fish in the aquarium, larger aquariums, e.g., 50 gallons and above for this species provide far more openness for small shoals to ‘peacefully’ coexist.
Experience Level: Beginner
Coral Safe: Yes
Invertebrate Safe: Yes
Acclimation Time: 30 minutes+
Aquarium Environment: Reef or fish-only aquarium
Minimum Tank Size: 50 gallons
Temperature Range: 72 - 84°F (22 – 28°C)
Specific Gravity: 1.020 - 1.026
pH: 8.0 - 8.5
Photo Credit: John Randall
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