Midnight Angelfish Care Guide
Centropyge nox · Saltwater Angelfish
What Midnight Angelfish look like
The Midnight Angelfish (Centropyge nox) exhibits a striking coloration characterized by a deep, dark blue to black body, adorned with bright yellow accents on the dorsal and anal fins, as well as a vibrant yellow-orange patch on the forehead. This species typically reaches a maximum adult size of approximately 4 inches (10 cm) in standard length. Sexual dimorphism is subtle, with males generally being slightly larger and exhibiting more pronounced fin extensions. Notably, the Midnight Angelfish possesses a small, terminal mouth adapted for grazing on algae and small invertebrates, and features a robust dorsal fin with a distinctively elongated first spine that can be raised as a defensive adaptation against predators. The lateral line system is well-developed, aiding in the detection of water movements and potential threats in its environment.
Behavior & temperament
The Midnight Angelfish is known for its semi-aggressive temperament, particularly during breeding periods or when establishing territory. It typically occupies the mid to lower levels of the reef, often found among rocky crevices and coral heads. This species displays a social hierarchy, often forming small groups or pairs, with dominant individuals asserting control over feeding territories. Breeding behavior involves courtship displays where males will perform intricate swimming patterns to attract females. The species is generally peaceful towards other fish but may exhibit territorial aggression towards conspecifics and similar-sized species.
Diet & feeding
In the wild, the Midnight Angelfish primarily feeds on algae, small invertebrates, and detritus. In captivity, it requires a varied diet that includes high-quality marine flakes, pellets, and frozen foods enriched with spirulina and other vegetable matter to maintain optimal health.
Behind the name
The genus name 'Centropyge' derives from the Greek words 'kentron' meaning 'spine' and 'pyge' meaning 'rump', referring to the spiny structure of the fish, while the species name 'nox' is Latin for 'night', likely alluding to its dark coloration.
Plan your tank
Check the numbers before you buy: tank volume, salinity, salt mix, water changes, and your ongoing care routine.
Keeping Midnight Angelfish?
AquaLens identifies your fish and plants from a photo, tracks water chemistry, and flags health issues early — free on iOS and Android.
