With seemingly only one gill on either side of their body, upper jaws fused to their skull, no scales, and eyes that are backed with a reflective tissue layer that makes them seem to glow in the dark, the Chimaera have an eerie and ghostlike appearance. They seem to move like ghosts too; as rather than most sharks that generate propulsion using their tails, ghost sharks use their large, wing-like pectoral fins to glide through the water – a characteristic more suited to a bird than a fish.
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