NEEMO 21 has an international crew, similar to the International Space Station. Our aquanauts this mission are from United States, Germany, Ireland and South Africa.
NEEMO 21 Aquanauts: Reid Wiseman (NASA), Megan McArthur (NASA), Matthias Maurer (ESA), Marc O Griofa (Teloregen/VEGA/AirDocs), Noel Du Toit (Naval Postgraduate School), Dawn Kernagis (Institute for Human & Machine Cognition), and FIU Habitat Technicians Hank Stark and Sean Moore.