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Flashcards in Shark Test Deck (29):
1

Some vertebrates are made of cartilage or

Bone

2

What are the largest group of vertebrates?

Fish

3

What are the types of marine fish?

Agnatha (jawless fish)
Chondrichthyes (cartilaginous fish)
Osteichthyes (bony fish)

4

Examples of Agnatha:

Hagfish
Lampreys

5

Muscular circular mouth
Long, cylindrical body
Lack fins & scales

Agnatha

6

Feed on dead and dying fish (scavengers)
Live in burrows in soft sediments

Hagfishes

7

Parasites
Return to freshwater to breed

Lamprey

8

Examples of Chondrichthyes (cartilaginous fish)

Sharks
Skates
Rays
Ratfish

9

Examples of Osteichthyes (bony fish):

Lobe-finned fishes
Ray-finned fishes

10

What fish are considered more advanced?

Chondrichthyes and Osteichthyes

11

Characteristics of more advanced fish:

Highly efficient gills
Scales
Paired fins
Many types of jaws
Lateral line and other sensory organs
Streamlined body

12

1000 species
5-7 gill slits
Spiraled
Claspers in males

Chondrichthyes

13

Openings on the head used to bring water directly in for respiration

Spiracles

14

Projections of the anal fin in makes used in copulation

Claspers

15

Why are the number of sharks decreasing?

Meat
Oil
Skin
Fins

16

Sensory organ used to detect electrical currents when sharks are close to an object

Organ of Lorenzini

17

Thin tissue that covers eye for protection

Nicticating membrane

18

Live birth

Vivipary

19

Lay egg cases

Ovipary

20

Internalized egg that hatches inside female before the young are expelled from the female

Ovovivipary

21

How many species of sharks?

350

22

Most sharks are? But some are

Carnivorous; planktonic

23

Prefer shallow, warm water
Will travel into fresh water
Short, blunt snout
7-11 ft

Bull shark

24

Stay in shallow water

Sand tiger shark

25

Prefer warm waters
Aggressive
13-20 ft
Use head to attack stingrays
Good vision
Ampullae of Lorenzini

Hammerhead shark

26

Largest fish in the sea (up to 40 ft)
Threatened
Filter feeder

Whale shark

27

Always have live birth
Pectoral fins expand into wings
Gill slits 5 pairs

Rays

28

Fleshy tail & no spine
Lay egg cases
Rat fishes

Skates

29

Are vertebrates

Marine fish