Boxfishes
Boxfishes (Ostraciidae) Overview
Boxfishes are closely related to the pufferfishes and filefishes. Five species can be seen in Hawaiian waters. Their bodies are encased in a rough shell and only their eyes, fins and mouths are movable. Some of them have a box-like shape, other are triangular, hexagonal or round. They usually stay by themselves, except when they are mating, and can be seen feeding on algae, worms, small crustaceans and sponges on the reef. Their Hawaiian name is pahu, meaning "box."
Frequently Asked Questions
Why are they called boxfishes?
Boxfishes get their name from their rigid, box-like body shape. Their bodies are encased in a hard shell made of fused bony plates, which gives them a unique geometric appearance.
Where can I see boxfishes in Hawaii?
Boxfishes are commonly found near coral reefs and rocky shores throughout Hawaii, where they feed close to the reef floor on algae, sponges, and small invertebrates.
How do boxfishes move with such stiff bodies?
Despite their rigid shells, boxfishes swim by using their pectoral fins for propulsion and their dorsal and anal fins for stability. Their movement is slow but very precise.
Do boxfishes have any defenses?
Yes, some boxfishes can release a toxic mucus when stressed, which can be harmful to other fish in confined spaces like aquariums. This defense helps deter predators in the wild.
What is the Hawaiian name for boxfish?
The Hawaiian word for boxfish is pahu, which translates to “box.” This refers to their distinctive, angular body shape.