Name _________________________________________________________ Date __________________ Period _______
Chapter 18 – The Fishes: Vertebrate Success in Water
1. General Characteristics of Fish:
2. Fish Evolution and Phylogenetic Relationships:
3. Classification of Living Fishes
Classification
Group Agnatha
Subphylum Hyperotreti
Class Cephalaspidomorphi
Class Chondrichthyes
Class Osteichthyes
Characteristics, Members & Additional Notes
4. Fish Locomotion:
5. Fish Nutrition and Digestive System:
6. Fish Circulation and Gas Exchange:
7. Fish Reproduction and Development:
8. Vocabulary
Term
Cloaca
Electroreception
Gill Arches and Gill Filaments
Lateral – Line Sytem
Operculum
Swim Bladders
Definition
9. Critical Thinking Questions. Choose 3 of the 5 to answer. Provide well thought out, scientific answers.
a. What characteristic of water makes it difficult to move through, but also makes support against gravity a
minor consideration? How is a fish adapted for moving through water?
b. Could a fish drown? Explain. Would it make a difference if the fish were an open-ocean fish, such as a
tuna, or a fish such as a freshwater perch?
c. Why is it a mistake to consider the cartilaginous skeleton of chondrichthians a primitive characteristic?
d. Would swim bladders with functional pneumatic ducts work well for a fish that lives at great depths?
Why or why not?
e. What would happen to a deep sea fish brought rapidly to the surface? Explain your answer in light of the
fact that has pressure in the swim bladders of some deep sea fishes increases up to about 300
atmospheres.
10. External and Internal Fish Anatomy