
Chaetodon unimaculatus
Family: Chaetodontidae Β· Butterflyfish
Also known as: One-Spot Butterflyfish, Teardrop Butterfly, Limespot Butterflyfish
The Teardrop Butterflyfish is a large and widespread butterflyfish species found across the Indo-Pacific, immediately identified by the prominent black teardrop-shaped spot on its upper flank. The body is a bright, uniform yellow, and a dark eye band contrasts sharply with the vivid base color. The anal and posterior dorsal fins are edged with dark bands, giving the fish a clean and striking profile. This species inhabits coral reefs from shallow lagoons to outer reef slopes, often at depths of 2 to 30 meters.
In the marine aquarium, the Teardrop Butterflyfish is a moderately challenging species that requires an experienced keeper and a spacious, well-established system. Its larger adult size of up to 8 inches means a minimum tank of 100 gallons is necessary. Most specimens will begin accepting frozen foods within a reasonable acclimation period, especially when offered mysis shrimp, enriched brine shrimp, and finely chopped seafood alongside spirulina and algae-based preparations.
This species is not reef safe and will consume soft coral polyps, zoanthids, and other sessile invertebrates. It is best suited for large fish-only or FOWLR aquariums with ample live rock for natural foraging and shelter. The Teardrop Butterflyfish is peaceful toward other fish and should be kept singly, as conspecific aggression is likely in typical aquarium-sized tanks.
Teardrop Butterflyfish are omnivores that feed on coral polyps, algae, and small invertebrates in the wild. In captivity, offer frozen mysis shrimp, enriched brine shrimp, spirulina, finely chopped seafood, marine flakes, and pellets. Feed two to three times daily to support their large body size.
The Teardrop Butterflyfish is peaceful and compatible with most community tankmates including tangs, wrasses, and angelfish. It will consume coral polyps and sessile invertebrates, making it unsuitable for reef setups. Avoid housing with other butterflyfish.
Check CompatibilityTeardrop Butterflyfish have not been bred in home aquariums. They are pelagic spawners with an extended larval tholichthys stage that is not feasible to replicate in captive environments.