Sharks. Mysterious, dangerous, and often feared, these predators of the sea are fascinating creatures that capture the interest of all ages. Each shark species is unique, with adaptations that help it survive in its own part of the ocean. Become an armchair marine biologist! This photo-illustrated book describes basking sharks, the larget sharks in the sea. Explains how they use gill-rakers to feed on zooplankton, their life cycle, and work being done to protect this species of huge but gentle sharks.