Luzon Island, Philippines
Closely related to pufferfish (family Tetraodontidae), the Rounded porcupinefish is one of the smaller of around 20 porcupinefish species (family Diodontidae), growing to only about seven or eight inches. The large eyes are well-adapted for night vision, when this species is most likely to be encountered. If threatened, this fish inflates itself by gulping water until it gradually becomes spherical in shape, completely rigid with its large, stiff spines pointed outward to prevent swallowing by potential predators. In addition to forcing the spines to point outward, the inflation of its body presents a larger appearance to help discourage predators.
Jeffrey N. Jeffords (photographer; copyright holder; identification)
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To cite this page: Myers, P., R. Espinosa, C. S. Parr, T. Jones, G. S. Hammond, and T. A. Dewey. 2017. The Animal Diversity Web (online). Accessed at http://animaldiversity.org.
Disclaimer: The Animal Diversity Web is an educational resource written largely by and for college students. ADW doesn't cover all species in the world, nor does it include all the latest scientific information about organisms we describe. Though we edit our accounts for accuracy, we cannot guarantee all information in those accounts. While ADW staff and contributors provide references to books and websites that we believe are reputable, we cannot necessarily endorse the contents of references beyond our control.