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•Moveable jaws (usually ventral) & well developed, replaceable teeth in 6-20 rows
•Cartilage skeleton
Skeleton of a porbeagle shark
•Rigid fins •Gill slits
•No swim bladder
•350 sp.
• Mostly predators
Great White Shark
Whale Shark
•Some filter feeders
•Well developed caudal (tail) fin
•Can not force water over gills; constant swimmers
•Exception: lemon & nurse sharks
•Rows of teeth
Andre Hartman – Crazy Shark Man
•No swim bladder –
•Large oily liver for buoyancy (20% body weight)
•Fusiform (torpedo shaped) body = fast swimmer
Blue Shark
•Countershading – dark on top, light on bottom
Great White Shark
Hammerhead Shark
450-550 sp.
•Flattened bodies; most benthic
exception – manta & eagle rays•Broad, wing-like pectoral fins for gliding through water
•Ventral gills (5 pairs) & mouth
Bluntnose Stingray
•Eat fish & invertebrates
Southern Stingray
Whip-like tail with stinger & poison gland
NO whip-like tail & poison gland
14 foot freshwater ray in Thailand
75 lb 5-6 foot spotted eagle ray kills woman in Florida (2008)