(CNN) A rare white orca calf has been spotted along the Washington coast, delighting whale watchers lucky enough to see him. Tl'uk, whose name means "moon" in Coastal Salish, is already something of a local celebrity in north coastal Washington. He's been spotted a handful of times in the Salish Sea by local whale watchers and cropped up again this weekend , Island Adventures Whale Watching lead naturalist Erin Gless told CNN. Gless said she's not sure how Tl'uk got his coloring--it worried researchers who first thought it signaled his health was declining. Tl'uk is a Bigg's killer whale, a transient type of orca that hunts seals and sea lions up and down the West coast.

Source: CNN October 14, 2019 15:22 UTC