Longsnout Butterflyfish

(Prognathodes aculeatus)

Prognathodes Butterflyfish should be added to well established aquariums with plenty of room to swim. Plenty of rock work should be provided for grazing and hiding. Prognathodes Butterflyfish are considered hardy and will generally adapt well in aquariums. A diet of meaty and algae based foods should be provided multiple times daily. Prognathodes Butterflyfish tend to be shy and peaceful but can become territorial if their aquarium is to small. Prognathodes Butterflyfish use their long noses to explore cracks and crevices for food and may pick at corals, crustaceans, algae and clam mantles if not well fed. A diet of meaty foods including live fortified Brine and mysis shrimp and black or red worms along with herbivore preparations should be provided. If not readily eating try pressing foods into holes or crevices mimicing their natural feeding habits. These Butterflyfish should be housed singly. Most fish in this species are considered to be cool water fish.

The Longsnout Butterflyfish is also known as the Caribbean Longnose, Rosy, or Atlantic Longnose Butterflyfish. Somewhat common in the aquarium trade. Longsnout Butterflyfish have a white belly coloration that enhances to yellow as it moves towards its dorsal fin, and finally meeting with a black dorsal. Longsnout Butterflyfish can grow to 4".

We recommend a minimum aquarium size of 75 gallons or larger for this species.

Water conditions: Salinity 1.020 - 1.025, Temp (F) 72 - 78, pH 8.1 - 8.4, Alkalinity 8 - 12 dKH

  • Care: CareEasyEasy CareModerateModerate
  • Behavior: BehaviorSocialSocial
  • Diet: DietFrozen FoodFrozen Food DietLive FoodLive Food
  • Habitat: HabitatReefReef
  • Light: LightMediumMedium