Identification
Permissions for Use
© Jeffrey N. Jeffords. Please remember that all photographs by Jeffrey N. Jeffords appearing on the Animal Diversity Web are copyrighted, and may not be used in any form, even on the Internet, without a licensing agreement. Exception: teachers and educators using the material in a classroom setting, students using this material for school assignments; or anyone for personal, non-commmercial use, such as screen savers. Unauthorized usage is a violation of the Federal Copyright Law. E-mail me for permission to use at this address: 
seaslugs@hotmail.com
Location
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)
