Keyhole Angelfish Care Guide
Centropyge tibicen · Saltwater Angelfish
What Keyhole Angelfish look like
The Keyhole Angelfish (Centropyge tibicen) exhibits a distinctive morphology characterized by a compact, laterally compressed body that can reach a maximum adult size of approximately 5 inches (12.7 cm). Its coloration is primarily a vibrant blue to yellow gradient, with a prominent black spot located near the base of the dorsal fin, resembling a keyhole, which serves as a key identifying feature. Sexual dimorphism is subtle, with males generally exhibiting slightly larger sizes and more pronounced coloration. Defensive adaptations include the ability to blend into coral environments and the presence of small, sharp spines on the dorsal fin, which can deter potential predators. The species also features a well-developed lateral line system that aids in detecting water movements and potential threats, while its dentition is adapted for grazing on algae, showcasing a set of small, brush-like teeth.
Behavior & temperament
The Keyhole Angelfish is known for its semi-social behavior, often found in pairs or small groups within its natural habitat, typically around coral reefs. It occupies the mid to lower levels of the reef, displaying a generally peaceful temperament but can exhibit territorial aggression, particularly during breeding seasons. Breeding behavior involves elaborate courtship displays, where males will perform a series of swimming patterns to attract females. The species is also known to be somewhat shy, often retreating into crevices when threatened, and exhibits a unique feeding behavior, where it grazes on algae and small invertebrates, often extending its body to reach food sources in tight spaces.
Diet & feeding
The Keyhole Angelfish is primarily herbivorous, feeding on a diet of algae and detritus in the wild. In captivity, it requires a varied diet that includes high-quality marine flakes, spirulina, and other algae-based foods to maintain optimal health.
Behind the name
The genus name 'Centropyge' derives from the Greek words 'kentron' meaning 'sharp point' and 'pyge' meaning 'rump', referring to the pointed shape of the fish's body. The species name 'tibicen' is Latin for 'piper' or 'flute player', likely alluding to the fish's melodic swimming patterns.
Plan your tank
Check the numbers before you buy: tank volume, salinity, salt mix, water changes, and your ongoing care routine.
Keeping Keyhole Angelfish?
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