What can’t they do!?
Aldabra Giant Tortoises (Dipsochelys dussumieri) are capable of traveling over 740 km of ocean and judging by the level of barnacle growth, can survive at sea for at least 6–7 weeks.
Gerlach, J. et al. (2006) The first substantiated case of trans-oceanic tortoise dispersal. Journal of Natural History 40(41) 2403–2408.