Origin and Distribution

The native range of the northern snakehead includes parts of Asia, Europe, and South America.
  True
  False

Transportation

Northern snakeheads have been intentionally imported into the U.S. both for human consumption and the aquarium trade.
  True
  False

Environmental Impact

Northern snakeheads negatively affect the environment because:
  A. They are very predatory and can alter the balance of the ecosystem.
  B. They are air-breathers and capable of migrating over land from one waterbody to another.
  C. Their native range and temperature tolerance indicate they could establish populations throughout
       most of the continental U.S.
  D. They are very aggressive in the protection of their young.
  E. All of the above.

Economic Impact

The U.S. Fish and Wildlife Service has determine that the economic benefit from commercial imports of snakehead fish as food (~$85,000 between 1997 and 2000) is outweighed by economic damages potentially costing:
  A. ~ $100,000.
  B. < $1 Million.
  C. ~ $500,000.
  D. > $1 Million.

Control

The primary control undertaken by the federal government to prevent further introductions of northern snakeheads into U.S. waters is:
  A. Asking live seafood markets not to sell northern snakeheads.
  B. A federal ban on live imports of northern snakeheads .
  C. Suggesting alternative species for consumption or use in aquarium trade.
  D. Removing all live northern snakeheads found in the wild.