This document contains a reading comprehension passage and questions about whales. It provides information about whales such as: - Whales are mammals, not fish, and cannot breathe underwater. They must go to the surface to breathe through a hole on their head. - There are different types of whales. The blue whale is the largest animal in the world, growing up to 37 meters long and weighing 150,000 kilograms. - Whales eat krill, plankton, fish, squid and sometimes seals, depending on the type of whale.