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Penetrating Piscine Patterns: X-Rays Reveal What's Beneath Fishes' Scales [Slide Show]

A new exhibition at the Smithsonian National Museum of Natural History reveals the complex structures within fish

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CURVY PREDATOR:
thumb: CURVY PREDATOR:
CURVY PREDATOR:

A viper moray eel has a second set of jaws in its throat, and preys on coral reefs.

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Sandra J. Raredon/Division of Fishes, National Museum of Natural History, Smithsonian Institution
PRICKLY PUFF:
thumb: PRICKLY PUFF:
PRICKLY PUFF:

When the long-spine porcupine fish pumps water into its stomach, it becomes round with bristles to ward off predators.

[Link to this slide]
Sandra J. Raredon/Division of Fishes, National Museum of Natural History, Smithsonian Institution
TINY HORSE:
thumb: TINY HORSE:
TINY HORSE:

The 2.5-centimeter-long body of the Dhiho's sea horse curls its tail to hold onto algae or coral. This species is only found in the waters around Japan.

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Sandra J. Raredon/Division of Fishes, National Museum of Natural History, Smithsonian Institution
WHAT'S DOWN THERE?:
thumb: WHAT'S DOWN THERE?:
WHAT'S DOWN THERE?:

This fish is called lookdown because of its sloped head appears to gaze downward. These fish swim in small schools.

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Sandra J. Raredon/Division of Fishes, National Museum of Natural History, Smithsonian Institution
SUCKERS:
thumb: SUCKERS:
SUCKERS:

The torrent loach uses suction cups to hold its position. This recently discovered species has yet to receive a scientific name.

[Link to this slide]
Sandra J. Raredon/Division of Fishes, National Museum of Natural History, Smithsonian Institution
READY, SET…:
thumb: READY, SET…:

READY, SET…:

The wedge-tail triggerfish protects itself with two sharp dorsal spines: a large, thick one and a shorter spine behind it. The second spine serves as a trigger, locking the first one in place....[More]

LONG AND SPINY:
thumb: LONG AND SPINY:
LONG AND SPINY:

This x-ray image of the crisscross prickleback, which was preserved in 1910, shows the prickles on the fish's back in great detail.

[Link to this slide]
Sandra J. Raredon/Division of Fishes, National Museum of Natural History, Smithsonian Institution
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