1. Fish Behavior by Day, Night and Twilight Ⅰ Overview Ⅱ Activities in Fishes 1. Feeding 2. Breeding Ⅲ Coral-Reef Fishes 1. Day-time 2. Night-time 3. Twilight 4. Determination of twilight behavior in coral-reef fishes Ⅳ Diel Patterns in Other Habitat Types 1. Temperate lake 2. Temperate marine fishes Ⅴ Summary and Prospective

2. Ⅰ Overview

5. Ⅱ Activities in Fishes 1. Feeding

7. 2. Breeding

10. Ⅲ Coral-Reef Fishes 1. Day-time

19. 2. Night-time

21. 3. Twilight

22. Five overlapping events at evening twilight that were essentiataly repeated in reverse at dawn. a. Migrations of diurnal fishes b. Cover-seeking of diurnal fishes c. Evacuation of the water column: the quiet period d. Emergence of the nocturnal fishes e. Migrations of nocturnal fishes

25. 4. Determination of twilight behavior in coral-reef fishes

28. Ⅳ Diel Patterns in Other Habitat Types

29. 1. Temperate lake

33. Other similarities between two systems: a.Dawn activities occurring at lower light levels than corresponding dusk activities b. Upsurge in non-feeding activities (e.g. agonistic behaviour) at dusk c. Ecological replacement stes, shifting to older individuals and larger-mouthed species at dusk d. A shift from group to individual activities in the evening e. A breakdown in characteristic twilight activtities during the breeding season f. An upsurge in predation at twilight

35. 2. Temperate marine fishes

43. Ⅴ Summary and Prospective