swellfish

As nouns the difference between swellfish and null

is that swellfish is (zoology) any plectognath fish that dilates itself, such as the pufferfish while null is zero, nil; the cardinal number before einn.

As nouns the difference between shellfish and swellfish

is that shellfish is an aquatic invertebrate, such as a mollusc or crustacean, that has a shell, especially as food while swellfish is (zoology) any plectognath fish that dilates itself, such as the pufferfish.

As a noun swellfish

is (zoology) any plectognath fish that dilates itself, such as the pufferfish.

As an adjective swellish is

(slang|dated) like a swell or dandy; stylish.

As nouns the difference between taxonomy and swellfish

is that taxonomy is the science or the technique used to make a classification while swellfish is (zoology) any plectognath fish that dilates itself, such as the pufferfish.

Swellfish is a synonym of pufferfish.

As nouns the difference between pufferfish and swellfish

is that pufferfish is 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 while swellfish is any plectognath fish that dilates itself, such as the pufferfish.

As a verb dilate

is .

As a noun swellfish is

(zoology) any plectognath fish that dilates itself, such as the pufferfish.

As a proper noun fish

is .

As a noun swellfish is

(zoology) any plectognath fish that dilates itself, such as the pufferfish.

As nouns the difference between plectognath and swellfish

is that plectognath is any fish of the order tetraodontiformes while swellfish is (zoology) any plectognath fish that dilates itself, such as the pufferfish.