Reef Butterflyfish Care Guide
Chaetodon sedentarius · Saltwater Butterflyfish
What Reef Butterflyfish look like
The Reef Butterflyfish, Chaetodon sedentarius, exhibits a laterally compressed body shape, typically reaching a maximum adult size of approximately 5.5 inches (14 cm). Its coloration is striking, characterized by a vibrant yellow body adorned with bold black vertical stripes and a distinctive black spot on the dorsal fin, which serves as a form of disruptive coloration. Sexual dimorphism is minimal, although males may display slightly larger dorsal fins. This species possesses a small, terminal mouth adapted for feeding on small invertebrates and coral polyps, complemented by a set of sharp, pointed teeth that facilitate grazing. The presence of a lateral line system allows for enhanced sensory perception in its reef habitat, aiding in navigation and predator avoidance.
Behavior & temperament
Chaetodon sedentarius is generally a social species, often found in pairs or small groups, exhibiting a clear social hierarchy within its territory. It primarily inhabits the upper levels of the reef, where it displays a moderate level of aggression towards intruders, especially during breeding periods. Breeding behavior involves elaborate courtship displays, including synchronized swimming and fin displays. The species is known for its territoriality, particularly around feeding areas, and it engages in both diurnal foraging and nocturnal hiding behaviors to avoid predators.
Diet & feeding
In the wild, the Reef Butterflyfish primarily feeds on coral polyps and small invertebrates, making it an obligate corallivore. In captivity, it requires a varied diet that includes high-quality frozen or live foods such as brine shrimp, mysis shrimp, and specialized coral foods to maintain optimal health.
Behind the name
The genus name 'Chaetodon' is derived from the Greek words 'chaite' meaning 'hair' and 'odous' meaning 'tooth', referring to the hair-like teeth of the fish. The species name 'sedentarius' is Latin for 'settled' or 'stationary', likely referencing its preference for a specific habitat within the reef.
Plan your tank
Check the numbers before you buy: tank volume, salinity, salt mix, water changes, and your ongoing care routine.
Keeping Reef Butterflyfish?
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