Jawless Fish and Marine Biology Concepts

Mr. Stan introduces the topic of fishes in marine biology, focusing on the distinction between 'fish' and 'fishes', and identifying true fish from non-fish. The lesson delves into the taxonomy of fishes, particularly the jawless fish known as Agnetha, and explores the characteristics and life cycles of hagfish and lampreys. The session concludes with a preview of the next lesson on sharks and rays.

What is the correct term to use when referring to multiple species of fish?

• Fishies

• Fish

• Fishes

• Fishs

Which of the following is not a true fish?

• Great White Shark

• Clownfish

• Lamprey

• Starfish

In marine biology, what is the superclass that includes jawless fish?

• Chondrichthyes

• Chordata

• Osteichthyes

• Agnetha

What is a defining characteristic of Agnetha, the jawless fish?

• They have a long slender body

• They have jaws

• They have a bony skeleton

• They have a two-chambered heart

Which period is known for the prevalence of jawless fish with armored plates?

• Jurassic

• Cretaceous

• Devonian

• Triassic

What is a common habitat for hagfish?

• Freshwater lakes

• Colder waters on the East Coast

• Coral reefs

• Tropical waters

How do lampreys feed on their hosts?

• By using their jaws to bite

• By suction and rasping with a tongue

• By filtering plankton

• By swallowing whole

What is the ecological impact of sea lampreys in the Great Lakes?

• They improve water quality

• They have no significant impact

• They are a major pest, affecting native fish

• They help control fish populations

What adaptation allows lampreys to attach to their hosts?

• Sticky skin

• Sharp claws

• Keratinized teeth and suction

• Strong fins

What is a unique feature of the lamprey's life cycle?

• They live only in freshwater

• They are born as adults

• They undergo metamorphosis

• They lay eggs in the ocean