1. Define nekton. (Also see p. 11G and figs. 14.21-14.26)
2. Give the dominant type of nekton.
3. List the three fish types.
4. Give an example of a jawless fish, a bony fish, and a cartilaginous fish.
5. Give the percentage of fishes that are bony fish.
6. Define demersal fishes and pelagic fishes.
7. List the most abundant fish species in coastal waters.
8. Contrast the reproduction of cartilaginous and bony fishes.
9. Discuss the belief the sharks are fearsome predators that hunt everything.
10. Give three examples of plankton-feeding cartilaginous fishes. (Also see fig.14.22)
11. Explain why most cephalopods migrate daily.
12. Give an example of cephalopoda. (Also see fig. 14.23)
13. Explain why most cephalopod species evolved forms without external shells.
14. Give an example of a cetacean. (Also see fig. 14.24)
15. Give an example of pinnipeds. (Also see fig. 14.25)
16. Explain why the hunting of most marine mammals was stopped decades ago.
17. List several of the remaining dangers to marine mammal populations.
18. Give an example of a marine reptile. (Also see fig. 14.26)
19. Explain why turtle populations declined precipitously in the last 200 years.
20. Give an example of a marine bird. (Also see fig. 14.27)
21. Explain why benthic communities are more varied than pelagic communities.
22. Explain why benthic coastal communities are more varied than deep-ocean benthic communities.
23. Give the primary food sources for deep-ocean benthic communities.