SHARKS

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SHARKS!!!
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Assignment

• Squatiniformes
• Pristiophoriformes
• Squaliformes
• Carchariniformes
• Lamniformes
• Orectolobiformes
• Heterodontiformes
• Hexanchiformes

• Body type (shape)
• 2 species
• Common color
• Location (deep sea, shallow sea, warm, cold,
  freshwater, saltwater)
• Interesting Fact (1 each)

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• Sharks are in the kingdom Animalia and Phylum
  Chordata
• Boneless Fish!! Has no bones only cartilage
• Still classified as a vertebrate
• Been around for a loooooooong time
• Since before dinosaurs

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How they differ from fish

• No bony structure
• Cartilage is a tough fibrous substance
• Not as hard as bone
• No swim bladder
• Fish have gas filled bladder which keeps them
  buoyant
• Sharks use their giant liver to help with buoyancy

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Sizes

• Range from 7 inches to 50feet

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Body shapes

• Genuinely sharks have a streamlined torpedo shape
• Sometimes vary differently for unknown reasons
• Ex. Hammerhead, Goblin shark, cookie cutter
  shark, Thresher shark

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Goblin Shark
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Thresher Shark
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Hammerhead Shark
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Cookie Cutter Shark
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Species

• Over 350 different species of sharks
• Most common shark is the spiny dogfish
• Least common
• Megamouth
• Great white

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Hungry???

• Sharks are carnivores..mostly
• Some species are filter feeders who consume large
  quantities of small aquatic plants and animals
• Diet ranges from fish, squid, sea lions other
  sharks to shellfish
• Slower swimming less aggressive sharks such as
  the angel shark eat crabs and clams!

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Shark attack!!

• Sharks do not feed on humans
• Only about 25 species are know to attack humans
• Fewer than 100 shark attacks per year
• More likely to die of bee stings or lightning!!
• Bull shark is most frequent attacker of humans
• Swim in shallow, populated waters