Q: Where do sharks live?
SW: Sharks make their home in temperate to tropical seas. Some also live in polar seas or freshwater rivers and lakes.
Q: Are they endangered?
SW: Though there are more than 400 species of sharks, unfortunately a growing number are listed as either threatened or endangered.
Q: What do they eat?
SW: Sharks eat mostly fishes (including other sharks and rays), but also squids, octopuses, and crustaceans. Some larger sharks, such as great white sharks, eat marine mammals. Tiger sharks are one of the few animals that can eat sea turtles. Basking, megamouth, and whale sharks filter-feed on plankton.
Q: How big do they get?
SW: Their size range is amazing. The smallest shark species is around 6 to 7 in. (15 - 18 cm) in length while the largest shark (and the world's largest fish) is the mammoth whale shark - it averages 13 to 39 ft. (4 m to 12 m) in length with one specimen found to be 59 ft. (18 m) long!
Q: Do sharks have to keep swimming to survive?
SW: Not all of them. Some species are able to rest on the ocean floor, opening and closing their mouths to pump water over their gills to respire.