EATEN ALIVE by Sea Lamprey!

Carrie Peterson explores the invasive sea lamprey in the Great Lakes, examining their impact on native fish and the fishing industry. She conducts an experiment to determine if these parasitic predators pose a threat to humans. Despite their alien-like appearance and primitive biology, the experiment reveals that sea lamprey do not attack humans, possibly due to their preference for cold-blooded prey. The video highlights the unique biology of sea lamprey and their historical invasion through man-made canals, leading to significant ecological and economic consequences.

What was the primary reason for the decline in the Great Lakes fishing industry in the 1960s?

• Overfishing by humans

• Pollution in the lakes

• Invasion of sea lampreys

• Climate change

What is the main reason sea lampreys are considered a threat to the Great Lakes ecosystem?

• They improve water quality

• They have no natural predators

• They help control fish populations

• They are a food source for native species

Which of the following best describes the sea lamprey?

• An alien species

• A modern fish

• A primitive fish

• A type of eel

How many extinction events have sea lampreys survived?

• Five

• Four

• Two

• Three

How do sea lampreys primarily attach to their prey?

• Using their fins

• With a suction disc

• By biting with jaws

• With their tails

What is the main component of a sea lamprey's body structure?

• Bones

• Scales

• Muscles

• Cartilage

What is the primary sense sea lampreys use to locate their prey?

• Touch

• Smell

• Hearing

• Sight

What is the primary diet of sea lampreys?

• Insects

• Mammals

• Fish

• Plants

What was the outcome of the experiment with sea lampreys and human arms?

• The lampreys attacked immediately

• The lampreys were aggressive

• The lampreys showed no interest

• The lampreys were scared

What is one theory for why sea lampreys did not bite the human subject?

• They have a poor sense of smell

• They were not hungry

• They prefer cold-blooded prey

• They prefer warm-blooded prey