A greatMertensii Butterfly!
Origin: Melanesia

Size info:
Size M: approx. 2.25 – 3.5″

There once was a Mertensii Butterfly,
Whose colors would catch any eye,
With a bright yellow stripe,
And a tail that’s just ripe,
It’s a beautiful fish, oh my!

This fish is found in the deep,
Where the coral reefs safely sleep,
It eats plankton and algae,
And is agile as can be,
It’s grace in motion, watch it creep!

With a small mouth and big appetite,
It’s a picky eater, that’s alright,
It likes to school with its kind,
And a mate it will always find,
A stunning fish, oh what a sight!

Keeping Mertensii Butterfly in an Aquarium

The Mertensii Butterfly, also known as the Bluecheek Butterfly, is a beautiful and popular fish among aquarium enthusiasts. Here are some things to keep in mind when keeping Mertensii Butterfly in your aquarium:

Tank Requirements

• Minimum tank size: 75 gallons
• Water temperature: 75-80°F
• Water parameters: pH 8.1-8.4, salinity 1.020-1.025
• Aquascape with plenty of live rock and hiding places

Diet

• Feed a varied diet of meaty foods such as frozen shrimp, krill, and mysis shrimp
• Can also be fed high-quality pellet or flake food
• Feed small amounts 2-3 times per day

Behavior

• Mertensii Butterfly is generally peaceful but may become aggressive towards other butterflyfish or fish with similar body shape or coloration
• May nip at coral or other invertebrates
• Best kept in a species tank or with other peaceful fish

Coolest Stuff

• Mertensii Butterfly is known for its striking blue coloration on the face and body
• They are active swimmers and will often swim in pairs or small groups in the wild
• They have a unique feeding behavior where they will pick at rocks and substrate to find small invertebrates and algae to eat
• Mertensii Butterfly can live up to 10 years in captivity with proper care