Fish Eye.: The barreleye (Macropinna microstoma) has extremely light-sensitive eyes that can rotate within a transparent, fluid-filled shield on its head. The bright green eyes point upward (as shown here) when the fish is looking for food overhead and forward when the fish is feeding. The two spots above the fish's mouth are olfactory organs analogous to human nostrils.
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It takes innovation to survive in a dark world. For the barreleye fish, that means directing…
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