Cartilaginous Fishes - Q&A

Question 1

Give one example of a cartilaginous fish that lives in the freshwater habitat from the report.

Answer 1

bull shark or freshwater stingray

Question 2

A gathering spot where solitary animals go to eat or to mate.

Answer 2

cafe

Question 3

Philippines located within the _____, known for its high marine biodiversity.

Answer 3

coral triangle

Question 4

Shark species that has antifreeze protein that enables them to survive in cold waters

Answer 4

sleeper sharks

Question 5

What countries are in the top five shark catchers?

Answer 5

• USA
• Mexico

Question 6

The special receptor organs that can be found in the lateral line system of cartilaginous fishes.

Answer 6

neuromasts

Question 7

Sharks and batoids have placoid scales that are also called ________.

Answer 7

dermal denticles

Question 8

Without hard bones, red blood cells are produced in the kidneys and a special organ called an _______.

Answer 8

epigonal

Question 9

How many waves of contractions are produced every minute during steady swimming?

Answer 9

54

Question 10

How does tapetum lucidum help in the cartilaginous fishes’ eyes?

Answer 10

helps vision in low light situations

Question 11

• shiny, reflective structure that reflects light
• helps vision in low light situations

Answer 11

tapetum lucidum

Question 12

What respiratory structure do bottom-dwelling chondrichthyes use to breathe?

Answer 12

spiracle

Question 13

It is a twisted or coiled organ designed to maximize the GI’s nutrient absorptive capabilities.

Answer 13

spiral valve

Question 14

The outflow chamber of the heart that releases blood to the shark’s gills to be oxygenated

Answer 14

Bulbus arteriosus

Question 15

What is the specialized immune structure along the esophagus that is found in chondrichthyes?

Answer 15

Leydig’s Organ

Question 16

The intromittent organ found in male sharks?

Answer 16

claspers

Question 17

Name the type of tail found in sharks where the upper lobe is longer than the lower lobe.

Answer 17

heterocercal tail

Question 18

cartilaginous fishes has a flattened body shape?

Answer 18

manta ray

Question 19

Sharks, skates, and rays regulate buoyancy using a swim bladder with a pneumatic duct connected to the esophagus.

T or F

Answer 19

False

Question 20

What type of skeleton do Chondrichthyes possess?

Answer 20

Cartilaginous skeleton

Question 21

Chondrichthyes are divided into two subclasses. Which group includes sharks, rays, skates, and sawfish?

Answer 21

Elasmobranchii

Question 22

Egg cases are commonly known as “____________”?

Answer 22

mermaid purse

Question 23

Sand Tiger Shark rather have an unusual mode of reproduction, What Mode of Reproduction do they exhibit specifically?

Answer 23

Intrauterine Cannibalism/Ovophagy

Question 24

How long is the gestation period of Basking Sharks?

Answer 24

3 1/2 years

Question 25

Just give its common name. What species of Shark bears its young mostly during winter, far out in the continental shelf of northeastern america?

Answer 25

Atlantic Spiny Dogfish (Squalus acanthias)

Question 26

What sampling method helps determine species diversity, population structure, and evolutionary relationship?

Answer 26

genetic sampling