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Evolutionary Tree of Sharks

By:Bobby O'Donnell and Jessica Geary

Wobbegong Shark

Goblin Shark

Whale shark

The End

Blue Shark

long pectoral fins

Tiger Shark

filter feeding

Thresher Shark

Shortfin Mako Shark

Bull Shark

specialized osmoregularity

trowel shaped snout

shorter darsal fin allow for speed

nicitating membrane

mouth in front of eyes

elongated caudal fin

Mouth behind eyes

no nicitating membrane

Bullhead Shark

rete mirabile

Dorsal fin without spine

Dorsal fin with spine

gill rakes

Basking Shark

White Shark

Cow Shark

6-7 gill slits

2 dorsal fins

Dog Fish

Short snout

5 gill slits

Japanese Saw Shark

Saw like snout

Pacific Angel Shark

Flat body

Anal fin

No anal fin

Ampullae of Lorenzini

2002 March

2000

2005

2010

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