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Bony Fishes
Using the word bank, write the part of the fish on the lines provided and then
describe its function.
1. Jaw- To capture and manipulate prey by biting and crushing.
2. Mouth- Useful in reaching food located in crevices and cracks.
3. Nostril- To detect chemicals in the water.
4. Eye- Seeing in air and in water.
5. Anterior dorsal fin- Increases lateral surface of body when swimming.
6. Posterior dorsal fin- Stops the fish from rolling when swimming.
7. Caudal fin- Helps propel fish forward.
8. Anal fin- Helps stabilize the fish.
9. Scales- Protection for fish.
10. Pelvic Fin- helps balance fish, keeps it level.
11. Pectoral Fin- Directional movement, like up, down and side to side.
12. Gills- Used for breathing.
Word Bank:
Anterior dorsal fin
Anal fin
Posterior dorsal fin
Pectoral fin
Pelvic fin
Caudal fin Gills
Using the types of coloration match it to a situation in which it might be useful
for a bony fish.
Disruptive coloration
b) Cryptic coloration
13. Deceive predators ___B____
c) Warning coloration
14. Show they are poisonous _C____
15. Break up the outline of the fish _A____
17. Fish that are found close to the shore are rarely as colorful as other fish. How
are they specially adapted to their habitat? Their skin color helps them blend
into their environment to hide from predators and help them catch prey.
18. Given the chart describing a mystery fish below would you classify it as
jawless, bony, or cartilaginous? What criteria helped you to make this decision?
I would classify it as Cartilaginous. Sharks match the description given and they
are Cartilaginous.
Long, thin body
Dorsal fin present
Swim bladder present
Gill slits
Eyes on both sides of
Rows of teeth
19. A fish is found with a downward facing mouth. What can be inferred about
its eating habits? Why does this structure benefit this fish? It can be inferred
that the fish is a bottom feeder . This can benefit the fish because
bottomfeeders often have barbels that help them locate food particles.
20. Explain why it is hypothesized that some fish participate in schooling
behavior. How does this benefit the fish? Fish that participate in schooling have
a bigger chance of finding food, potential mates and have better protection from
Label the Shark with the terms:
Gill Slits
Dorsal Fin
Pectoral Fin
Posterior Dorsal Fin
Lateral Line Canal
Ampullae of Lorenzini
Caudal Fin
Pelvic Fin
1. Spiracle
2. Lateral Line Canal
3. Gill Slits
4. First dorsal fin
5. Second dorsal fin
6. Caudal Fin
7. Pectoral Fin
8. Pelvic Fin
9. Claspers
10. Mouth
11. Nostrils