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Porcupinefish are medium-to-large fish belonging to the family Diodontidae from the order Tetraodontiformes [2] which are also commonly called blowfish and, sometimes, balloonfish and globefish. The family includes about 18 species.
The long-spine porcupine fish is an omnivore that feeds on mollusks, sea urchins, hermit crabs, snails, and crabs during its active phase at night. [5] They use their beak combined with plates on the roof of their mouths to crush their prey such as mollusks and sea urchins that would otherwise be indigestible.
The Black-blotched porcupinefish is a medium-sized fish which grows up to 65 cm (26 in), but the average size most likely to be observed is 45 cm (18 in). [1] Its body is elongated with a spherical head with big round protruding eyes and a large mouth that is rarely closed.
A porcupine's colouring aids in part of its defence as most of the predators are nocturnal and colour-blind. A porcupine's markings are black and white. The dark body and coarse hair of the porcupine are dark brown/black and when quills are raised, present a white strip down its back mimicking the look of a skunk.
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It is distinguished from the porcupinefish by the shorter, less sharply pointed, and immovable spines which cover the somewhat spherical body. It can inflate its body by taking either air or water into a ventral extension of the stomach.
The name 'spine hog' makes sense, although a porcupine has nothing to do with pigs. It's actually a large rodent. Believe it or not, some species of porcupines are really good swimmers!
The spot-fin porcupinefish is a medium-sized fish which grows up to 91 cm, but the average size mostly observed is 40 cm. [2] Its body is elongated with a spherical head with big round protruding eyes, and a large mouth which is rarely closed.