They mainly used AUVs (Autonomous Underwater Vehicles) to find it.
The team involved in the project included: Michael Triantafyllou, David Barrett who built the first RoboTuna (Charlie I) in 1995 for his PhD thesis, and David Beal and Michael Sachinis, who introduced several modification including a cable-pulley system to produce RoboTuna II.
Michael Jackson | Order of St Michael and St George | Michael Bloomberg | Michael Jordan | Michael Caine | Michael | Michael Palin | Michael Moore | George Michael | Michael Dukakis | Michael W. Smith | Michael Douglas | Michael Bolton | Michael Schumacher | Michael J. Fox | Michael Bublé | Michael Faraday | Michael Moorcock | Michael Kors | Michael Brecker | Michael Bay | Michael Nyman | Michael Phelps | Michael Ondaatje | John Michael Montgomery | St. Michael | Michael Landon | Saint Michael, Barbados | Michael Somare | Live! with Kelly and Michael |