What percent of the body mass of a fish is muscle?
80%
How many classes of fish are there?
5
Where do amphibians have teeth?
On their top jaw
During which life phase, larva or adult, do amphibians lack limbs?
Larva
The accidental capture of fish and other marine animals during commercial fishing is called
Bycatch
What does the lateral line of a fish sense?
Vibrations
Which class of fish have a cartilage endoskeleton with a complete vertebral column
Chondrichthyes
Which structure do frogs and toads have in order to hear their surroundings?
Tympanum
Adult
What is shark finning?
The process of capturing a shark, cutting off their fins and throwing the sharks back into the ocean to sink to the bottom and die.
What is the purpose of the caudal fin?
It propels the fish forward in water.
Which class of fish are parasites that drink blood and body fluids?
Myxini
Which organ allows an amphibian to smell their environment?
Jacobson's organ
Which amphibians do not undergo metamorphosis?
What are 2 ways that humans depend upon or benefit from amphibians?
1. Food source
2. Researching the venom of certain frogs as potential medicines
What is the purpose of the pyloric caeca
digestive organ that increases the surface area of the intestine to increase nutrient absorption.
Which *bonus* sense do sharks, rays, eels, and catfish have? And what can they sense?
What are 2 reasons amphibians need to live in a moist environment?
1. They breathe through their skin and drink through it.
2. Require moisture for laying their eggs
Which class of amphibians can regenerate limbs that have been lost?
What are 3 ways that humans depend upon or benefit from fish?
1. Recreational activity - fishing & aquariums
2. Part of the human diet
3. Medicines
What is it called when the eggs develop outside of the mother's body? Give an example of the eggs.
Ovipartiy.
Mermaids purse
What are the 5 classes of fish?
1. Actinopterygii
2. Chondrichthyes
3. Hyperoartia
4. Myxini
5. Sarcopterygii
Draw a diagram of circulation in an amphibian. Include the words heart, lungs and body tissues. Label the 2 circuits of circulation. Include arrows

What are the 3 Orders of amphibians?
1. Anura
2. Apoda
3. Caudata
What is harvested from sharks and used to treat arthritis?
Chondroitin