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Barney's Barrier Reef

Episode 17: Sea Trek

Duration: 30 minutes

on BBC Two Wales

While exploring Australia's Barrier Reef, Barney Harwood and Gemma Hunt discover creatures which can cross great distances owing to their amazing navigational skills. Show more

BBC Two Wales

About BBC Two

BBC Two is a lively channel of depth and substance, carrying a range of knowledge-building programming complemented by great drama, comedy and arts.