The Hi Fin Butterflyfish, Coradion altivelis, also known as the Highfin Coralfish, is a striking and slender marine fish characterized by its tall, laterally compressed body and elongated dorsal fin, which gives the species its common name. Its colouration features a pale whitish to light yellow base with three distinct, broad vertical black bands across the body. Simualr to Copperbands, one of the bands run through the eye, another through the midsection, and a third near the tail. Between these stripes, subtle yellow or orange hues can sometimes be seen, especially near the dorsal and caudal regions. The dorsal fin is notably high and pointed, extending well above the body and giving the fish a graceful appearance. Habitat: The Hi Fin Butterflyfish is typically found in coastal marine environments, particularly in shallow reef flats, lagoons, and outer reef slopes. It prefers clear waters and is often associated with coral-rich areas where it can feed and find shelter. These butterflyfish are commonly seen in pairs or small groups, navigating among coral branches and rocky outcrops. Their natural diet consists of corals, sponges, and small invertebrates, which they pick from crevices using their pointed snouts. Distribution: The Hi Fin Butterflyfish has a distribution range that spans the tropical Indo-Pacific region. It is commonly found throughout Indonesia, Papua New Guinea, and parts of northern Australia, including the Great Barrier Reef. Its presence has also been recorded in the Philippines and around the Solomon Islands. While not as widely distributed as some other butterflyfish species, it remains relatively common within its range, particularly in coral-dense areas with stable environmental conditions. Keeping Hi Fin Butterflyfish altivelis Healthy: Caring for Hi Fin Butterflyfish demands a moderate to high level of expertise in marine aquarium husbandry. They are considered somewhat challenging due to their specific dietary needs and potential for territorial behaviour. Maintaining stable water conditions, such as a temperature range of 75-82°F (24-28°C) and a pH of 8.1-8.4, is crucial. An appropriately sized tank with good water flow and high-quality filtration is essential. Special Requirements and Feeding: Hi Fin Butterflyfish are primarily coral polyp feeders in the wild. In captivity, their diet should consist of a variety of live or frozen foods, including brine shrimp, mysis shrimp, and specially formulated marine fish foods. Regular feedings should mimic their natural grazing behaviour on polyps. Care should be taken to ensure a well-balanced diet rich in protein and vitamins. How Many Should I Keep: It’s advisable to keep a single Hi Fin Butterflyfish altivelis or a mated pair in an aquarium setting. They can be territorial, particularly during feeding, which may lead to aggression towards conspecifics. Lighting Preference: These fish do not have specific lighting requirements, but they thrive under moderate to high-intensity lighting, which can help enhance the vibrant colours of their scales. Suitable Tank Mates: Hi Fin Butterflyfish altivelis can be compatible with a range of reef-safe species, including angelfish, tangs, and other butterflyfish, as long as there is ample space and hiding spots. However, caution should be exercised when selecting tank mates, as they may nip at certain corals and invertebrates. Ensure that tank mates share similar environmental preferences and dietary requirements to promote a harmonious marine ecosystem.
