Some of the marine fish we like to keep are surprisingly recognizable to both hobbyists and non-hobbyists alike—probably because they’re frequently depicted in photographs and artwork. Among these iconic fishes is the raccoon butterflyfish (Chaetodon lunula) of the Indo-Pacific and southeast Atlantic, a very hardy species that’s better than your average butterfly in terms of aquarium suitability and even beginner-friendliness.C. Lunulawould also be a great choice for natural pest-anemone control in reef tanks if it could be kept in such a system safely (but, alas, it cannot—more on this later).
Physical traits
C. Lunula具有“典型的”蝴蝶鱼的形态，新万博苹果具有高度横向压缩的身体和尖头的鼻子。它的颜色是橙黄色的整体，背侧半部有着昏暗的色调，腹侧半部微弱。就像它的陆地同名一样，它的眼睛被黑色的“面具”遮住了。面具的后面是一个白色的条，两条黑色的带子从白色的吧台向上延伸。尾花梗具有杰出的黑色“眼点”。该物种的最大长度约为8英寸。
Feeding
Fishbase notes thatC. Lunulaadults feed primarily on nudibranchs, tubeworm tentacles, and other benthic invertebrates, as well as algae and coral polyps. Captive specimens will accept a variety of meaty items, such as mysids; chopped clam, shrimp, or fish; and frozen commercial formulas for small carnivores. Multiple small daily feedings are preferable.
Housing
Some sources put minimum housing for this species at 75 gallons, but I would err on the side of a bigger tank—more along the lines of 100 to 125 gallons minimum. Also in keeping with its terrestrial namesake, this species is nocturnal by nature (though it will likely acclimate to daytime activity in time), so be sure to provide a good amount of caves and ledges for it to refuge in/under along with a大量的开放游泳空间to boot (thus my recommendation for a larger tank).
Compatibility
C. Lunulais relatively peaceful and will usually get along fine with other live-and-let-live fish species. Multiple conspecifics can be kept together in larger tanks, but they may squabble with one another or with closely related species.
As alluded in my intro above,C. Lunulais not a good candidate for reef aquariums. This species will eat or nibble on a wide range of sessile invertebrates, as well as small ornamental crustaceans, and would wreak havoc in such systems.
