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Dr Helen Scales: is a marine biologist specialising in the international wildlife trade, marine protection and biodiversity assessment: she’s also a diver, broadcaster and author of Posseidon’s Steed (a book about the noble seahorse). She’s spent four years chasing big fish in Borneo and another year cataloguing marine life surrounding 100 Andaman Sea islands, she’s drunk champagne with David Attenborough and talked seahorse sex with Diane Rehm. She also has a surname that is rather fitting for a marine biologist.