Read the passage given below and answer the questions that follow: Though whales are mammals and fish are not, they are similar in some ways. Both have fins and a tail, which helps them swim and stay upright in the water. But these similarities are in appearance only. Whales move their body through the water with the help of their horizontal tail, which flaps up and down to propel them through the water. Fish, on the other hand, have vertical tails, which move from side to side. Even though whales are huge creatures, they can reach astounding speeds when swimming. Killer whales can swim up to 37 miles per hour; some dolphins move at speeds of 18 miles per hour, while the large Fin Whale cruises along at 13 to 16 miles per hour. Right Whales and Gray Whales are somewhat slower, with a top speed of about 6 miles per hour. How fast fish swim depends on the size and shape of the fish. Herring, a small fish, swims at only 3 miles per hour. Swordfish are the speedsters. They have been cloc...