Kaup, 1855 
Fish of the genus Cyclicthys have three-rooted, rigid spines (actually modified scales) distributed over their bodies, and beak-like jaws, used to crush their hard-shelled prey (crustaceans and molluscs). They differ from the porcupinefishes of the genus Diodon, which have moveable spines.
Like Tetraodontidae (blowfish) they have the ability to inflate themselves. Their inflated size combined with their spines make them extremely difficult to swallow. They may be poisonous, through the accumulation of tetrodotoxin or ciguatera.
- Cyclichthys hardenbergi (de Beaufort, 1939) (Hardenburg's burrfish)
- Cyclichthys orbicularis (Bloch, 1785) (Birdbeak burrfish)
- Cyclichthys spilostylus (Leis & J. E. Randall, 1982) (Spotbase burrfish)
- WoRMS (2012). Nicolas Bailly, ed. "Cyclichthys Kaup, 1855". FishBase. World Register of Marine Species. Retrieved April 17, 2012.
- Lieske, E. and Myers, R. F. (2004) Coral reef guide; Red Sea London, HarperCollins ISBN 0-00-715986-2
- Froese, Rainer, and Daniel Pauly, eds. (2012). Species of Cyclicthys in FishBase. October 2012 version.