Valuable ambergris - known as floating gold - has recently been found at Rhos on Sea and Shell Island, reports the Daily Post.
Finds of ambergis can be worth around £2,000 - and they could lead to a gold rush among would-be beachcombers.
Ambergis is used to produce perfume and can fetch more than £10 a gram.
It is produced when the whale has been eating squid and their parrot-like beaks have irritated the walls of its innards.
Rarely recovered on British shores, ambergris is usually found on the coasts of the United States and Australia.
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