We just returned from our spring cruise to Dabob Bay in the state of Washington. The purpose of our cruise was to explore a hypothesis that has to do with the foraging behavior of zooplankton, the small (1-4 mm) animals that live in the sea. Every night they make a big trip to the surface waters from the deeper parts of the ocean to forage on plants (phytoplankton). Once there, do they eat, turn around, go back down? or: Do they eat and keep eating up in the surface waters? Our new imaging system is a bispectral (two wavelength) method which records not only the green reflected light from their outsides (carapace) but also their insides (the phytoplankton) that they ate that fluoresces in the red. Together, the green reflected light and the red light from their insides tells us which animals they are and how recently they ate. We spent about 8 days on the U. of Washington ship the Tommy Thompson in Dabob Bay and worked almost all night to see these little guys make a living. We returned, tired but happy with lots of great data that will help us try and unravel how these animals, probably the most numerous multicellular animal on the planet, make a living.