What does blowfish mean?
A blowfish is any of numerous fish in the family Tetraodontidae, better known scientifically as pufferfish, named for their remarkable ability to inflate their bodies into a spiny ball by gulping water or air when threatened. Found mainly in warm coastal waters, many species also carry tetrodotoxin, a poison concentrated in the organs and skin that is among the most deadly natural toxins known. Because of this danger, blowfish occupies a unique place at the dinner table: in Japan, where the fish is called fugu, only chefs who complete rigorous licensing and training may prepare it, and eating it carries a thrill of risk that has made it famous worldwide. In American English blowfish is the informal everyday term, while pufferfish predominates in scientific and British contexts. Whether encountered in an aquarium, on a reef dive, or on a carefully plated dish of sashimi, the blowfish combines biological oddity, danger, and culinary prestige in a single memorable creature.
Any of various fish of the family Tetraodontidae capable of inflating their bodies into a ball as a defense, many species being toxic.
"A startled blowfish puffed up into a prickly sphere in the diver's flashlight beam."
The flesh of such a fish eaten as food, especially in Japan under the name fugu, requiring careful preparation due to its toxins.
"Adventurous diners pay high prices for expertly sliced blowfish served as paper-thin sashimi."
In culinary contexts the Japanese loanword fugu is often preferred, even outside Japan.
Like most fish names ending in -fish, blowfish usually stays unchanged in the plural; the regular form blowfishes occurs occasionally, mainly when counting individual specimens.
"The reef teemed with brightly patterned blowfish hovering near the coral."
A single blowfish carries enough tetrodotoxin to kill dozens of adult humans — yet it remains one of Japan's most prized delicacies.
Reviewed by Deb Chak, Editor. AI-assisted content curated by RJS Tech Solutions LLP.
Etymology of blowfish
The word blowfish is a straightforward English compound formed from the verb blow, referring to the fish's habit of swelling itself with water or air, combined with fish. It emerged in American English in the nineteenth century as a colloquial common name alongside older synonyms such as swellfish and globefish. Both elements are native Germanic words, so the compound has no Latin or Greek root; its closest relatives are other descriptive fish compounds like catfish and sunfish rather than cognates from a shared classical stem.
How blowfish is actually used
Blowfish is chiefly an informal American English name; British usage and scientific writing favor pufferfish. The plural is typically blowfish (unchanged), though blowfishes appears occasionally when referring to multiple individuals. As a food term it overlaps with the borrowed Japanese word fugu.
Easily confused with blowfish
Pufferfish is the more standard scientific and common name for the same family of fish, while blowfish is an informal American synonym; neither term denotes a different species.
Sunfish are large, harmless open-ocean fish unrelated to blowfish, despite a similar rounded body shape.