Nurse sharks have razor sharp but small teeth that seldom penetrate deeply: "Holding still reduces damage to both shark and man."
护士鲨有剃刀般锋利但很小的牙齿，很少能深入地穿透：“不动弹能够减少对鲨鱼和人类的伤害。”
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Mitchell and colleagues found antibiotic-resistant bacteria in seven species of shark—such as bull sharks, lemon sharks, and nurse sharks—as well as the redfish Sciaenops ocellata.