Sharks

Top 10 Quirkiest Sharks

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by: Cristen Conger
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DCL | Photo by Jason Pickering / SeaPics.com
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Nurse sharks (Ginglymostoma cirratum) acquired their odd moniker from sheer mispronunciation. According to HowStuffWorks.com writer Molly Edmonds, Middle English speakers began referring to the fish as "huss" sharks, which gradually morphed into "nuss." From there, "nuss" evolved into "nurse."

Behaviorally, nurse sharks are also a little strange. Remarkably lazy, these 7- to 9-foot (2.1- to 2.7-meter) sharks lead a highly sedentary life, refusing to migrate in colder months and maintaining a limited diet. Unlike other shark species that must move in order to breathe, nurse sharks have even gotten around that bit of physical activity: Their respiratory systems are adapted to let them breathe while motionless.

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