Days were spent diving to conduct experiments and gather data to study the effects of climate change and pollution on coral reefs, while the evenings were spent in Aquarius on lab work, relaxation and stress tests: Cousteau and his crew made themselves available for physiological and psychological tests to determine the effects of long-term living under the sea and without sunlight. The crew also appeared on Weather Channel broadcasts periodically. They used a sonar device that records a wide range of frequencies and a slow-motion camera to capture more thorough data and installed tiny probes, less than the width of a human hair, into the coral reef. Among the animals seen during the expedition were eels, mantis shrimp, octopus, plankton, porkfish, snook, sponges, spotted eagle rays, starfish, tarpon, and various reef sharks. The crew also observed an Atlantic goliath grouper attack a barracuda, a scene which Shantz described as "something I never imagined happening".
