You’ll find on this page species belonging to 3 closely related fish families: the Tetraodontidae (pufferfish), the Diodontidae (porcupinefish) and the Ostraciidae (boxfish, trunkfish). Puffers and porcupines are known for their capacity to puff up, while boxfish have kind of an exoskeleton, and sometimes small horns.
Pufferfish and porcupinefish are very easy to identify. They have the ability to “puff up” in a few seconds by swelling water if they are threatened or stressed. With this « balloon » shape, they appear much larger than they are, and are especially more difficult to bite for predators. Porcupinefish also have large external spines, making them looking like “spiny balloons” when inflated. Most of pufferfish species are also highly toxic: some parts of the fugu (species from the Takifugu genus), considered a delicacy in Japan, has enough poison to kill around thirty people. Most species grow to 20 to 50cm in length, but the stellar pufferfish can grow to up to 120cm.
Boxfish have a more limited capacity to inflate themselves (only 20 to 30% of their volume), but have a very compact body, and can also release toxins in the event of aggression. They are a small family of around thirty species found in warm seas.
Pufferfish, porcupinefish and boxfish are easy to spot when snorkeling the rocky beds and coral reefs of tropical and subtropical seas, often at very shallow depths. Whitespotted puffer is common from the Red Sea to the Eastern Pacific, where it abounds on the rocky shores of Costa Rica. Guineafowl puffer, which is sometimes completely yellow, is also widely distributed on the reefs of the Indo-Pacific, for example in the lagoons of Reunion Island. If you snorkel in Egypt or Jordan, you will certainly encounter the masked pufferfish, endemic to the Red Sea. Whilst pufferfish live mainly in salt water, some species are also found in brackish water, such as the checkered puffer, commonly spotted at the edge of the mangroves in the Caribbean.
The long-spine porcupinefish and the spotfin porcupinefish are circumtropical, which means that they are present in all tropical seas of the planet.
In the Caribbean, spotted and smooth trunkfish are both very common at shallow reefs. In the Indo-Pacific, you will often come across the yellow boxfish, whose juvenile exhibit an adorable bright yellow and black dots coloration. The whitespotted boxfish, whose male and female have different colorations, is also common on many spots.
Caribbean sharp-nose puffer
Valentinni’s sharpnose puffer
Bennett’s sharpnose puffer
Spotted sharpnosed puffer
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