Species Description…

Scientific Name: Centropyge tibicen

Common Name: Keyhole Angelfish

Species Group: Angelfish

Habitat: Reef Safe with Caution

Care Level: Intermediate

Temperament: Semi-aggressive

Diet Type: Omnivore

Role in Aquarium: Showpiece Fish

Max Fish Length: 4 (inches)

Min Aquarium Size: 55 (gallons)

Native Range: Indo-Pacific

Centropyge Tibicen - The Keyhole Angelfish

Centropyge Tibicen (The Keyhole Angelfish)

Native to the Indo-Pacific region, commonly found in coral reefs, lagoons, and rocky reef slopes.
Easily identified by its deep black body with a distinctive white spot resembling a "keyhole" on its side.
A hardy species that adapts well to captivity but can exhibit territorial tendencies.
Moderately active, preferring to swim close to rock formations and reef structures.
Best suited for a mature marine aquarium with ample hiding spaces and live rock for grazing.

Omnivorous, feeding on algae, sponges, and small invertebrates in the wild.
Accepts high-quality marine pellets, frozen foods, and algae-based diets in captivity.
Providing sponge-based foods is essential for maintaining long-term health and vibrant coloration.
Multiple small feedings per day ensure sustained energy and proper nutrition.
A varied diet supports immune health and enhances natural coloration.

Prefers reef environments with rocky outcrops and coral formations for shelter.
Thrives in stable water conditions with moderate to strong water flow.
Aquarium setups should include live rock structures to encourage grazing and hiding.
Requires a well-maintained marine tank with high water quality to minimize stress.
Providing shaded areas and multiple caves helps reduce aggression and promotes a sense of security.

Optimal water temperature: 74-80°F (23-27°C) to maintain overall health.
Preferred pH range: 8.1-8.4, with a salinity level of 1.020-1.025.
Requires strong filtration and regular water changes to keep water conditions stable.
Introducing it to an established aquarium with live rock helps ease its transition into captivity.
Providing a structured environment with caves and crevices encourages natural behaviors.

Semi-aggressive, particularly toward other dwarf angelfish and similar-sized fish.
Compatible with tangs, wrasses, and other semi-aggressive reef fish.
Not entirely reef-safe, as it may nip at soft corals and sessile invertebrates.
Should not be housed with overly aggressive species that may cause stress or outcompete it for food.
Providing ample swimming space and defined territories helps minimize territorial behavior.

A bold and active species that enjoys exploring its environment.
Often seen darting around rock formations and occasionally grazing on algae.
Can become territorial in smaller aquariums or when housed with other angelfish.
Providing live rock structures and a well-structured tank setup supports natural behaviors.
Over time, it may become more comfortable with its caretaker and exhibit interactive behaviors, particularly during feeding.