The 22-year-old whale is the only adult Orca ever to have been spotted in the wild.

Just one in ten thousand killer whales, also known as Orcas, are completely white.

Young white killer whales are sometimes seen in the wild, but they usually die before they reach adulthood.

The species usually live to around 30, but can survive until 50 or 60. They mature at 15.

The latest spotting of Iceberg was recorded by American researcher Erich Hoyt, 65, of the Far East Russia Orca Project who was also the very first person to see the animal.

He told the BBC at the time: "We've seen another two white orcas in Russia but they've been young, whereas this is the first time we've seen a mature adult.

"Iceberg seems to be fully socialised; we know that these fish-eating orcas stay with their mothers for life, and as far as we can see he's right behind his mother with presumably his brothers next to him."