Four Eye Butterflyfish (Chaetodon capistratus)
The Four Eye Butterflyfish is a classic and instantly recognizable saltwater fish, named for the bold black “false eye” spot near the tail that helps confuse predators in the wild. Its bright yellow body, accented with vertical striping and a contrasting black facial mask, makes it a standout addition to larger marine aquariums.
Native to the Caribbean and Western Atlantic, the Four Eye Butterflyfish is an active swimmer that does best in spacious tanks with plenty of open water and live rock for grazing and shelter. It has a peaceful temperament and generally does well with other non-aggressive fish, making it a great candidate for community fish-only systems.
While hardy once established, this species is not considered suitable for beginners due to its specific environmental needs and sensitivity to water parameters.
| Specifications |
|---|
| Scientific Name: Chaetodon capistratus |
| Origin: Caribbean and Western Atlantic |
| Temperament: Peaceful, non-aggressive |
| Water Conditions: Stable salinity, temperature between 75-82°F, pH 8.1-8.4 |
| Adult Size: 3-4 inches |
| Compatibility: Best with non-aggressive fish, avoids small or aggressive species |
FAQ
What is the ideal tank size for a Four Eye Butterflyfish?
A minimum of 50 gallons is recommended to provide enough open water and space for active swimming, along with adequate live rock for grazing and shelter.
Is the Four Eye Butterflyfish suitable for beginners?
No, this species is not recommended for beginners due to its sensitivity to water parameters and need for stable, well-maintained conditions.
How does the Four Eye Butterflyfish defend itself in the wild?
It uses a bold black ‘false eye’ spot near the tail to confuse predators, making it appear to have two eyes and deterring attacks.
Connor Clark –
After setting up a 75-gallon tank with proper live rock and stable water parameters, the Four Eye Butterflyfish became a vibrant centerpiece. It swims actively and seems content in the open water. Only requires regular water testing and a consistent feeding schedule.
Michelle James –
The fish is striking in appearance with its yellow body and black mask. It’s peaceful and doesn’t bother other fish. I had to invest in a good filtration system and monitor water parameters closely, but it’s worth it for the visual appeal.
Blake Blake –
It’s a beautiful fish, but I found it challenging to keep stable. Water changes and testing were frequent. Not ideal for small tanks or new aquarists without experience.