Milletseed butterflyfish

Chaetodon miliaris

Also known as Lemon Butterflyfish, Millet Butterflyfish, Milletseed Coralfish

SaltwaterFish

Care at a glance

Temperature
72–79°F
22–26°C
pH
8.1–8.4
Adult size
5.1 in
13 cm
Minimum tank
75 gal
285 L
Temperament
Peaceful
Social behavior
Schooling
Swim level
Middle
Difficulty
Easy
Breeding
No record
Rarity
Common
Reef safe
Reef safe with caution
Family
Chaetodontidae
Origin
A Hawaiian endemic, abundant throughout the Hawaiian Islands and Johnston Atoll from shallow reefs to deep drop offs.

Overview

Keep it in a 285 litre or larger tank at 22 to 26 C and pH 8.1 to 8.4, since it comes from slightly cooler Hawaiian reefs. It is reef safe with caution, as it feeds mainly on plankton but may sample polyps and feather dusters. It is one of the easier butterflyfish to feed and takes mysis, enriched brine, and eventually flake and pellet. It is peaceful and can be kept singly or in a small group.

In the wild

The milletseed butterflyfish is a lemon yellow fish marked with rows of small dark spots like scattered seeds. It is the most common butterflyfish in Hawaii and often gathers in large feeding groups. It feeds heavily on zooplankton in open water, unlike the coral picking habits of many relatives. It ranges from shallow reefs down to deep drop offs.

Good to know

Chaetodon miliaris is a butterflyfish in the family Chaetodontidae found almost only in Hawaiian waters. Its planktivorous habit makes it hardier and easier to feed than most butterflyfish. It has even been recorded cleaning parasites from other fish and picking eggs from nests.

Did you know

It is one of the best beginner butterflyfish because it schools, feeds readily, and adapts to aquarium food faster than its coral eating cousins.

Weekly picks

Tank mates

Milletseed butterflyfish is a peaceful, schooling species that keeps to the middle. These picks share a community profile with it, are safe together in both directions, and overlap on water type, temperature and pH.

Check the full mix in the stocking calculator

Common questions

What size tank does a Milletseed butterflyfish need?

A Milletseed butterflyfish needs at least 75 gal (285 L). It spends most of its time in the middle.

What temperature and pH does a Milletseed butterflyfish need?

A Milletseed butterflyfish is comfortable at 72–79°F (22–26°C) with a pH of 8.1–8.4.

How big does a Milletseed butterflyfish get?

An adult Milletseed butterflyfish reaches about 5.1 in (13 cm).

Does a Milletseed butterflyfish need a group?

Yes. A Milletseed butterflyfish is a schooling species and should be kept in a group, not singly.

Related species