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Basics

Scientific Name: Chaetodon mertensii

Family: Chaetodontidae

Origin: Indo-Pacific, Fiji

Quick Facts

• Care Level: Moderate
• Temperament: Peaceful
• Lifespan: 5-7 years, possibly longer
• Reef Compatible: With Caution
• Water Conditions: 72-78° F, dKH 8-12, pH 8.1-8.4, sg 1.020-1.025
• Maximum Size: 5"- 6"
• Diet: Omnivore
• Minimum Tank Size: 100 gallons

Overview 

The Mertensii Butterflyfish, also simply known as the Mertens Butterflyfish, is a light silver color with a pearlescent sheen and black chevron markings along its body. The chevron stripes have a slightly blurred, criss-cross appearance. The posterior and tail is a striking almost yellow orange. It has a black stripe through its eye.

It will appreciate ample swimming space and hiding places. A peaceful species, it can be housed with other butterflies provided that they are introduced at the same time, and can cohabitate with a variety of other tankmates. It may nip at invertebrates within a reef setting. It's diet should be mostly meaty with some herbivorous preparations as well.