His primary research interest concerns the physiology of squids and octopuses living in extreme environments such as the deep-sea. Of particular interest are species that migrate each day into a layer of low oxygen at about 700 meters depth, returning each night to shallower water to feed. The jumbo squid, Dosidicus gigas is an extreme example. It reaches nearly 2 meters in length and 50 kg. Its active lifestyle in shallow-water cannot be maintained at its deeper daytime habitat due to oxygen limitation. Exactly how these amazing animals survive at depth is one question being addressed on this cruise.