South African Hanli Prinsloo travels the world to capture images of life in the sea. She gives public talks about falling in love with the ocean, a necessary step to protect it. She also heads I Am Water, an organisation that teaches children about ocean conservation.
South African researcher Alison Kock is one of an international group of contributors to a massive photo library of great white shark fins – one they hope will enable them to eventually track the movements of every great white.
• Saving our vulnerable sharks