Beluga Charms British With Impromptu Visit

"Dave Andrews couldn't believe what he was seeing. And then he couldn't believe what he was tweeting."

"'Can't believe I'm writing this, no joke - BELUGA in the Thames off Coalhouse Fort,' the Norfolk, England, resident posted on Twitter Tuesday."

"The ecologist and ornithologist, as described on his Twitter account, had spotted a beluga whale swimming in the River Thames east of London, far from its normal habitat."

"A beluga swimming in the Thames is undoubtedly rare, and a social media frenzy ensued."

"Sky News caught the animal on camera from a helicopter above the river."

"Shortly after that, the Natural History Museum in London quoted their whale expert as saying, 'The white body colour, absence of a prominent dorsal fin, bulbous forehead and general swimming motion all suggest very strongly that this is a beluga whale.'"