Longfin bannerfish is another species of butterfly fish but in comparison to other species they’re easy to take care of. They’re also suitable for beginner saltwater aquarist. If tank-mates are selected carefully you don’t need to worry about them much as they’re quite peaceful. They’re found in indo-pacific, north and south japan and are available near reef slopes.
They’re also known as “Poor Man’s Moorish Idol or Black and White Butterflyfish or Bannerfish, Pennant Coralfish or Wimple fish”. It’s scientific name is Heniochus acuminatus. It is called as “poor man’s moorish idol” cause it looks similar to moorish idol and hence the name.
Longfin bannerfish has lifespan of about 5 or more years. It also requires saltwater tank much larger of about 100 gallons.
Size & Color : Their size grows from 10 inches (25 cm). It has white and black stripped body and tailfin in yellow color. You’ll find dorsal fin longer and looks more like antenna to it.
Ph & Temperature: Longfin bannerfish requires temperature of about 22-26°C and pH 8.1-8.4, salinity 1.020-1.025. There should be good filtration inside the tank if you wish to keep them.
Breeding: There are not much of reports of longfin bannerfish breeding in home aquarium setup. There are cases of breeding in public aquarium. Longfin bannerfish female lays eggs and scatter around the tank. It is observed that they need temperature and water quality change in order to trigger spawning as per season.
Food: They accept wide variety of food when placed in home aquarium setup. You can feed them vitamin enriched food flakes as well. Vary their diet from live food, frozen food to vegetarian food flakes. They’ll often eat algae growing on the surface of live rock if they get hungry so you also need to feed them often at least 2-3 times a day.
Behavior : They usually dwell from bottom to top and across all the areas of the tank. They’ll often hide under stone/marble cave if there is any else they’ll lurk around live rock. They’re peaceful towards other peaceful tank-mates but they’ll often have conflicts with other butterfly fishes like Copperband butterfly fish and Racoon Butterfly fish. Also don’t place them with tang fishes. They’re not reef tank safe and will often attack other small invertebrate & small coral.
They’re popular in aquarium trade so there will not be much hassle to find and purchase them. In such case you can order them online. Their cost starts from 27$ onwards. You can keep multiple specimen inside one tank and there will not be much conflict if the tank is larger. For large saltwater aquarium setup they’ll put a good show.