It 's `` a juvenile great white shark about 10 to 12 feet long , '' expert Jeff Kurr says . `` The tail is flat , '' like a dolphin -- not a shark , expert David Shiffman says . The difference in the experts ' opinions centers on how they view the tail . But the dorsal fin has two rows of teeth that are sharp and can cut through blubber or flesh with ease. Great white sharks are no danger to southern California swimmers , expert says .
It 's `` a juvenile great white shark about 10 to 12 feet long , '' expert Jeff Kurr says . `` The tail is flat , '' like a dolphin -- not a shark , expert David Shiffman says . But the dorsal fin has two rows of teeth that are sharp and can cut through blubber or flesh with ease. Great white sharks are no danger to southern California swimmers , expert says .