Heather J. Koldewey is the co-founder of Project Seahorse and head of marine and freshwater for the Zoological Society of London-London Zoo Aquarium.

[3][4] Her research interests focus on marine and freshwater conservation, seahorse biology and genetics, and the impact of the aquarium trade on wild populations of fish and aquatic invertebrates.

[5][6][7] Beginning in 1998, she co-chaired a series of workshops that established the first co-ordinated conservation breeding programmes for fish and aquatic invertebrates in European aquariums.

She has been engaged in marine and freshwater conservation efforts, including programmes in the UK, Philippines, Hong Kong, Sri Lanka, Mexico, Nepal and Mozambique.

[10] Koldewey is Chair of the Fish Section of the IUCN Re-introduction Specialist Group, and a UK government zoo inspector.