Saltwater Fish
Pyramid Butterflyfish

Species Description…

Scientific Name: Hemitaurichthys polylepis
Common Name: Pyramid Butterflyfish
Species Group: Butterflyfish
Habitat: Reef Safe
Care Level: Intermediate
Temperament: Peaceful
Diet Type: Omnivore
Role in Aquarium: Schooling Fish
Max Fish Length: 3 (inches)
Min Aquarium Size: 30 (gallons)
Native Range: Indo-Pacific, including the Philippines, Indonesia, and the Great Barrier Reef
Hemitaurichthys polylepis - Pyramid Butterflyfish

Hemitaurichthys polylepis (Pyramid Butterflyfish)

Overview

  • Native to the Indo-Pacific region, ranging from the Red Sea to Hawaii and the central Pacific.
  • Named for the distinctive white triangular "pyramid" shape on its body, contrasting with a yellow dorsal area.
  • A peaceful and social species, often found in large schools over outer reef slopes and drop-offs.
  • Highly adaptable and resilient, making it one of the best butterflyfish species for aquariums.
  • Prefers an open water environment but requires rock structures for shelter and security.

Feeding

  • Omnivorous diet, primarily feeding on plankton and algae in the wild.
  • Readily consumes a variety of aquarium foods, including high-quality flakes, pellets, frozen mysis shrimp, and brine shrimp.
  • Thrives on a mix of meaty and vegetable-based foods to maintain its health and coloration.
  • Requires frequent feedings (at least 2-3 times per day) due to its high metabolism.
  • Can benefit from supplemental feedings of marine algae or spirulina-based foods.

Habitat

  • Commonly found in outer reef slopes, near strong currents where plankton is abundant.
  • Prefers open swimming areas but will utilize rock formations for occasional shelter.
  • Requires a well-established aquarium with excellent water quality and stable conditions.
  • Best suited for large tanks (minimum 120 gallons) due to its active swimming behavior.
  • Moderate to strong water flow is recommended to replicate its natural habitat.

Fish Care

  • Optimal water temperature: 74-80°F (23-27°C).
  • Ideal pH range: 8.1-8.4, with a specific gravity of 1.023-1.026.
  • Requires stable water conditions and a well-maintained aquarium.
  • One of the more disease-resistant butterflyfish but still benefits from a varied diet and clean environment.
  • Regular water changes and high-quality filtration ensure long-term health.

Compatibility

  • Generally peaceful and suitable for community reef tanks.
  • Best kept in groups of three or more, as it thrives in social settings.
  • Compatible with other peaceful reef fish such as tangs, wrasses, and clownfish.
  • Reef-safe, as it does not typically nip at corals, unlike other butterflyfish species.
  • May be intimidated by highly aggressive fish but does well in a mixed-reef environment.

Aquarium Behavior

  • Highly active swimmer, often seen cruising the mid-to-upper water column.
  • Engages in social interactions with tank mates, especially when housed in groups.
  • Curious and intelligent, quickly adapting to new environments.
  • Non-aggressive but may become shy if housed with overly boisterous tank mates.
  • Thrives in an environment with stable water conditions, frequent feedings, and ample swimming space.