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Carcharhiniformes
Carcharhiniformes
Groundsharks, like this blacknose shark, have a nictitating membrane which can be drawn over the eye to protect it.
Groundsharks, like this blacknose shark, have a nictitating membrane which can be drawn over the eye to protect it.
Image: Carcharhinus melanopterus SI2
Image: Carcharhinus melanopterus SI2
Image: Tiger shark
Image: Tiger shark
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Shark
Shark
Fossil shark tooth (size over 9 cm or 3.5 inches) with crown, shoulder, root and root lobe
Fossil shark tooth (size over 9 cm or 3.5 inches) with crown, shoulder, root and root lobe
A collection of Cretaceous shark teeth
A collection of Cretaceous shark teeth
Shark fossil, Lebachacanthus senckenbergianus, at Permian period
Shark fossil, Lebachacanthus senckenbergianus, at Permian period