Overview
The Foxface Rabbitfish is a bright yellow saltwater fish that lives on coral reefs in the warm Pacific Ocean. Its long, pointed face looks a bit like a fox, and its gentle munching on algae gives it the rabbit part of its name. In a home aquarium it needs saltwater and lots of space, since it grows to about the length of a school ruler.
This fish is peaceful and spends its days grazing on algae growing on live rock. But it carries a secret defense. The spines in its fins are venomous, and it can raise them when it feels scared. It will not chase you, but keepers learn to move slowly and never grab it, because a poke from those spines stings.
| Care level | Moderate |
| Adult size | 9 in (23 cm) |
| Lifespan | 5-10 years |
| Temperament | Peaceful |
| Min. tank | 125 gallons (473 L) |
| Temperature | 72-78 F (22-26 C) |
| pH | 8.1-8.4 |
| Diet | Herbivore |
| Schooling | No, usually kept singly or as a bonded pair |
A reef grazer
In the wild, Foxface Rabbitfish drift over reefs eating algae off the rocks. In a tank they help keep nuisance algae under control, acting like a friendly underwater lawnmower.
Venomous spines
The spines in the fins are tipped with venom for defense against predators. The fish would rather hide or swim away, but keepers always handle it with care and never touch the spines.
Mood colors
When a Foxface feels stressed or sleeps at night, its bright yellow can fade into a blotchy brown pattern. When it feels calm and safe, the sunny yellow returns.
Big tank needed
Because it grows to around 9 inches and loves to swim, this fish needs a large reef tank of at least 125 gallons to stay healthy and happy.
Fun facts
- The Foxface can change color to a mottled brown when it sleeps or feels nervous.
- Its fin spines are venomous, so divers and keepers are careful never to touch them.
- It belongs to a group called rabbitfish because of the way it nibbles on algae.
- A healthy Foxface can live for a decade or more in a well-cared-for reef tank.
- It is generally reef safe, meaning it usually leaves corals alone and eats algae instead.
Frequently asked questions
Is the Foxface dangerous to people?
It is not aggressive, but its fin spines are venomous. A sting hurts, so keepers move slowly and never try to grab it by hand.
Why did my Foxface turn brown?
It changes color when it sleeps or feels stressed. Once it feels safe again, its bright yellow color comes back.
What does it eat?
It is mostly a plant eater. Feed it dried seaweed, algae sheets, and prepared foods made for herbivores.
Can I keep it in a small tank?
No. It grows large and needs lots of swimming room, so a big saltwater tank of at least 125 gallons is best.
