On the reef this angelfish feeds on sponges, tunicates, algae, and other encrusting or sessile organisms, which makes dietary variety the single most important factor in captive success. Sponge-based angelfish preparations should anchor the menu, supplemented with marine algae and Spirulina, mysis shrimp, enriched brine shrimp, frozen shrimp, and other suitable marine meaty items. Avoid a diet that leans too heavily on meaty foods, since the sponge and plant components better reflect what the species actually consumes in nature.

Feed small portions at least three times daily, and more frequently during the first weeks after introduction. Newly added fish are often shy and will retreat into rockwork, so ample caves and repeated small offerings help draw them out and establish a feeding response. Smaller individuals, particularly those under about 8 inches, are reported to adapt to aquarium life more readily than fully grown adults.

Blue Face Angelfish are typically solitary in the wild, and captive specimens grow steadily more territorial as they claim space within the aquarium. Juveniles frequently hide at first, while established fish become bold, conspicuous, and willing to defend a chosen section of rockwork. Keep only one per system, and avoid other angelfishes altogether where possible, especially species of similar shape or coloration. Suitable companions are large, robust fishes capable of tolerating its territorial disposition; small, passive species are poor choices. Introducing this angelfish after calmer tankmates are already settled reduces its ability to dominate the entire aquarium.

This species is not reef safe. It is inclined to nip stony and soft corals, clam mantles, sponges, tubeworms, and other sessile invertebrates, and while some observers describe juveniles as less destructive, adults reliably cause damage in a mixed reef. A fish-only aquarium furnished with live rock is the sound long-term plan. The evidence reviewed does not specifically address risk to shrimp, crabs, or snails, so mobile invertebrates should be considered on a case-by-case basis rather than assumed safe.