A white humpback that created a buzz as Australia's second albino whale now has some concerned over its health and unusual migration pattern.

The famed Migaloo lost his title as the one and only true albino whale in Australia's east coast population when a white juvenile spotted off the NSW South Coast last week was confirmed to be albino.

But while humpback whales migrate thousands of kilometres south to Antarctica to feed, the albino, fondly named "Siale", is travelling north.

Her 10-metre-long body also appears thin. 

Organisation for the Rescue and Research of Cetaceans (ORRCA) spokesperson Pip Jacobs confirmed Siale had lost body condition.

"Based on the current information and footage we have of Siale, we can't draw any conclusions about her health," she said.

"It's

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