Sharks and Relatives

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Sharks and Relatives
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Sharks and Relatives

• The skeleton is made of ___________, so they are
  often called _________________
• Examples include

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The Hagfish

• Also called slime hags and slime eels
• They are found on the seafloor, and there can be
  up to _________ per area
• They have ______________, ________, and their
  mouth is surrounded by ___________________
• ____________

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• They eat small prey, or are scavengers
• They are eaten by _____________________
• ____________________________________
• They are eaten in _____________________, and the
  skin is tanned and used as leather (eelskin)

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Defence Mechanism

• Although the slime is usually secreted as a
  small quantity of viscous, white fluid, it
  expands several hundred times as it absorbs
  seawater to form a slime ball that can coat the
  gills of predatory fish and either suffocate them
  or distress them enough to make them swim away

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Lampreys
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Skates and Rays
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Sharks

• There are about ______ species, but only ___
  have attacked people
• Over ____ species are less than __ m long as
  adults

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• There are about ____ species of shark seasonally
  off the Maritimes
• Dogfish, blue shark, porbeagle, mako etc

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• Sharks are scavengers, but they also prey on
  plankton (whale shark, basking shark, megamouth),
  seals, fish, and each other