different between pufferfish vs swellfish

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Wikispecies

puffer +? fish

pufferfish (plural pufferfish or pufferfishes)

Any species of fish of the family Tetraodontidae that have the ability to inflate themselves to a globe several times their normal size by swallowing water or air when threatened; puffer, blowfish, swellfish, balloonfish, globefish.
A delicacy popular in Japan served raw as sushi that may, if improperly prepared, contain deadly levels of neurotoxins; (Japanese) fugu.

swell +? fish

swellfish (plural swellfishes or swellfish)

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