Rabbitfish primarily feed on algae and seaweed growing on reef surfaces.
By controlling algae growth, they help maintain healthy coral ecosystems around Koh Tao and support reef resilience.
Rabbit Fish
Scientific name Siganidae
Rabbitfish are easily recognised by their oval bodies, small rabbit-like faces and often intricate patterns of spots, stripes or mottled colouration. Many species have a slightly pointed snout and large eyes, giving them a gentle appearance.
Around Koh Tao, rabbitfish are commonly seen in pairs or small groups grazing along coral reefs and rocky areas between 3–25 metres. Some species form larger schools in sheltered bays.
They are primarily herbivores, constantly nibbling algae from reef surfaces. This grazing behaviour plays an important role in preventing algae from overgrowing coral.
Rabbitfish possess venomous spines along their dorsal and anal fins. While not aggressive, they can inflict a painful sting if handled or accidentally touched. Divers should simply observe and maintain good buoyancy.
Find Rabbit Fish at...
Divemaster's tip
Look for pairs moving methodically along reef edges — many rabbitfish species are often seen in male-female pairs.
Avoid swimming too close above them, as sudden movement may cause them to dart into coral cover.
