All whales have lungs. No whale has gills. The whale Shark has gills, but that name comes from it being a Shark - a fish - the size of a whale.
A great white shark is a little bit bigger
To eat and for caviar specially. Note: the Beluga Sturgeon is unrelated to the (mammalian) beluga whale.
The blue whale is bigger than the whale shark. The whale shark is not a whale.
no, but a sperm whale can.
Moby Dick Beluga whale.
man
A beluga whale is a whale of the species Delphinapterus leucas.
No it is in the middle. The Beluga whale can get eaten by a sucker fish, you may think a tiny creature couldn't kill such a huge one, but it can. you see a sucker fish can bite the Beluga whale, and get the other sucker fish to join and suck the Beluga Whale's blood. This can only happen to a Beluga whale, because the sucker fish can't get there teeth through the thick layer of blubber of the others, but a Beluga whale has a thin layer of blubber, which the sucker fish can get into. This is why the beluga whale got its name. Named after the Greek legand Beluga, who had such a small layer of skin, you could see her insides; but that's only a legend.
No
yes it can kill.
A Killer Whale or Orcanus Orca.