Two groups of Tursiops truncatus-one in captivity for over six years and the other captured in the Mississippi Sound and transported to Hawaii in April 1984-were monitored monthly for weight changes and daily for food consumption and caloric intake. During this time, at least three major diet changes occurred, due to unavailability of specific fish species and to poor quality of some of the substituted species. Chemical analysis and gross energy measurements were performed on all lots of fish. Similarities were noted between the two groups as reflected in weight change patterns and caloric requirements. It appears that newly captured animals, even after a long-distance transport, permanent change of environment and several diet changes, adapt readily, showing almost identical nutritional responses as the established group of animals.