Callum Michael Roberts is a British marine conservation biologist, oceanographer, science communicator, author and research scholar at the University of Exeter.

His research output has examined the benefits of marine reserves and no-fishing zones on sustainable fisheries and biodiversity.

He is the Chief Scientific Advisor to Blue Marine Foundation[1] and an Ambassador for World Wide Fund for Nature.

[8] Since 2011 Roberts has written occasional opinion editorials for The Guardian[9] on various marine conservation topics, including overfishing.

[1][8] He is the author of two award-winning books, The Unnatural History of the Sea (Rachel Carson Award, 2007), which examined the impact of human activity and fishing on marine ecosystems over the last thousand years,[12][13] and Ocean of Life (Mountbatten Award, 2013), which covers more recent changes in the ocean and proposes reforms to facilitate their recovery.