Fishes

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Characteristics of agnatha

jawless, no scales

Fish swim in schools to avoid _______________

predators

Food is processed in fingerlike pouches called

pyloric ceca

Fish whose eggs hatch outside the mother's body are called _________________

oviparous

What jawless fish secretes incredible amounts of slime?

hagfish

Characteristics of chondrichthyes

flexible skeleton made of cartilage, hinged jaws, scales, paired fins

Fresh water fish tend to ______ water, whereas saltwater fish tend to _______ water.

1.) gain 2.) lose

What are the three groups of fishes?

1.) jawless 2.) bony 3.)cartilagenous

4 major characteristics of a fish include:

1.) two-chambered heart 2.) oxygen is extracted through gills capillaries 3.) sexual reproduction; external fertilization 4.) many offspring are produced, but little if any parental care is provided by parents

The 3 classes of fish are:

1.) agnatha (jawless fish) 2.) chondrichthyes (cartilaginous fish) 3.) osteichthyes (bony fish)

Two major groups of fish survive today, one group has a skeleton made of ______________, the other has a skeleton made of __________ _________.

1.) cartilage 2.) true bone

Which period is called "Age of fishes"

Devonian period

Fishes are ________ vertebrates; most fishes have paired fins, scales, and gills.

aquatic

Name a shark that is a filter feeder

basking

Paired fins gave fish more control over _________ _____________.

body movement

Osteichthyes means __________ ________

bony fish

characteristics of osteichthyes

bony skeleton composed of calcium compounds

The purpose of the swim-bladder is to regulate ________________

buoyancy

The skeleton of a shark is made up of ____________

cartilage

What type of fish have no scales?

catfish

To what CLASS do sharks belong?

chrondrichthyes

Jaws allow fish to do what?

eat a wider variety of food

What fish travels to saltwater to breed?

european eal

Gills are made of feathery structures called __________

filaments

What two features were important developments during the evolution of fishes?

jaws and paired fins

____________ are excretory organs that filter wastes from the blood

kidneys

examples of agnatha

lamprey and hagfish

Name a parasitic fish:

lampreys

What are two classes of jawless fish?

lampreys and hagfish

What three fish migrate to fresh water to breed?

lampreys, salmon, sturgeons

The two major groups of fish in Class Osteichthyes are the:

lobe finned fish and the ray finned fish

The lobe-finned fishes include the coelacanth and the __________

lung fishes

The gill cover that pumps water over the gills is called the _________________

operculum

What structure covers and protects the gills?

operculum

To what CLASS do bony fish belong

osterichthyes

Fish whose eggs stay within the mother are called ________________

ovvoviviparous

examples of chandrichthyes

sharks and rays

Name a species of fish where the young are "born alive"

sharks, guppies (viviparous)

Fish have ________ loop circulation

single

What structure keeps a fish from sinking?

swim blatter

Some examples of ray-finned fish include:

trout, tuna, bass, salmon

What are two chambers in a fishes heart?

ventricle, atrium

Do fish have a sense of smell?

yes


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