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X-ray image of a winghead shark
Slideshow

X-Rays of Fish Reveal Diversity

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A school of grooved razorfish seen in x-ray imaging.
Photo

X-Ray Image of Grooved Razorfish

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X-ray image of a longnose butterflyfish
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X-Ray Image of a Longnose Butterflyfish

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Tropical hatchetfish, like the one shown in this X-ray photograph, live in the dark depths of the ocean. Like many other deep-sea fishes, they have large eyes and bioluminescent spots on their bellies.
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X-Ray Image of a Tropical Hatchetfish

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The long toothy rostrum or “saw," which gives the smalltooth sawfish its common name, is clearly seen in this X-ray image.
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X-Ray Image of a Smalltooth Sawfish

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In the X-ray image of this Viper Moray Eel (Enchelynassa canina), note the second set of jaws in the “throat”; these are the gill arches, which are present in all fish.
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X-Ray Image of a Viper Moray Eel

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X-ray image of a long-spined porcupine fish
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X-Ray Image of a Long-Spined Porcupine Fish

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Two nurse sharks hover over a baited cage
Lesson Plan

Paper Plate Fish Lesson

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Photo of sockeye salmon spawning.
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Sockeye Salmon, Adams River, British Columbia, Canada

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A wrought iron butterflyfish being cleaned by a small wrasse in the waters of Japan's Ogasawara Islands.
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Butterflyfish and Wrasse

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An underwater photo of a yellow-mouth moray eel.
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Yellow-mouth Moray Eel in the Red Sea (Eilat, Israel)

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Dover Sole Skin
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Close-Up of Dover Sole Skin

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