Lamprey Anatomy and Behavior

The video discusses the behavior and anatomy of sea lampreys, which attach to larger fish and have recently been known to attack swimmers. Dr. Ellen Maren, a specialist in lampreys, explains the differences between lampreys and eels, highlighting that lampreys are primitive proto-vertebrates without true jaws. The video details the lamprey's feeding mechanism, which involves using a piston-like tongue with chisel-like teeth to rasp a hole in prey and suck out fluids. A personal encounter with a lamprey is also shared, illustrating their snake-like appearance.

What recent behavior have sea lampreys exhibited?

• Feeding on plankton

• Migrating to rivers

• Attacking larger fish

• Attacking swimmers

Who is Dr. Ellen Maren?

• A fish expert

• A specialist in sea lampreys

• A swimmer

• A marine biologist

How are lampreys commonly mistaken?

• As snakes

• As eels

• As dolphins

• As sharks

What is a key anatomical difference between lampreys and eels?

• Eels have no lower mandible

• Eels have no bones

• Lampreys have no true jaw

• Lampreys have a bony backbone

How many years of evolution separate lampreys and eels?

• 400 million years

• 300 million years

• 200 million years

• 100 million years

What is the primary function of the teeth-like structures on a lamprey?

• To crush

• To bite

• To grip

• To chew

What mechanism does a lamprey use to feed?

• Chewing

• Suction

• Swallowing whole

• Biting

What role does the lamprey's tongue play in feeding?

• It rasps a hole

• It chews food

• It swallows food

• It bites prey

What does the lamprey use to extract body fluids from its prey?

• Its teeth

• Its jaw

• Suction

• Its fins

What was the narrator's last image of the lamprey?

• A fish

• A dolphin

• A snake

• A shark