Yes, they do. They are in fact the biggest coastal sharks in the world.
no
Yes. Near the coast of Japan they have found some.
Great white sharks still exist.
Yes, sharks still do exist. They live In The Oceans.
Sharks are the biggest fish.
Tiger Sharks are their biggest threats
The great whales are. (Blues, Finbacks, Sperm, Greys) There are smaller whales - Minkes, for example - and a great white might be as big or bigger that one of them. Incidentally, great whites are NOT the biggest sharks. Basking sharks and the appropriately named whale sharks are bigger still. Even the biggest whale shark isn't as big as the biggest whale, though.
no
yes
no sharks are
Yes