Called "Megalodon: The Monster Shark Lives," the two-hour documentary, which Discovery calls "dramatized," kicked off the channel's annual "Shark Week." It featured actors pretending to be scientists who are hunting for a live 67-foot-long (20-meter-long) megalodon nicknamed Submarine that is terrorizing humans and their boats off the coast of South Africa.

The show sparked online outrage, as viewers took to Twitter to blast what they called a "mockumentary" under the hashtag #megalodon and to demand an apology from the network.

"'We're out of fun facts about sharks so we've decided to make some up.' —@Sharkweek" tweeted @ElieNYC, inventing a sarcastic quote.

Also on Twitter, @chrishildreth referred to Shark Week as "Lifetime for animals now. Drama and bad