Ecosystems & Fisheries-Oceanography Coordinated Investigations (EcoFOCI) is an effort by National Oceanic and Atmospheric Administration (NOAA) and associated academic scientists. Eco-FOCI's goal is to understand the effects of abiotic and biotic variability on ecosystems of the North Pacific Ocean and Bering Sea. This cruise is in support of research sponsored by NOAA's North Pacific Climate Regimes & Ecosystem Productivity Program, the North Pacific Research Board (NPRB), and PMEL/AFSC base. This cruise supports the research of the BEST program, that is, the Bering Ecosystem STudy and BSIERP, the Bering Sea Integrated Ecosystem Research Program. The primary purpose of this cruise is to observe the ecosystem of the eastern Bering Sea under late summer and early fall conditions. Operations primarily consisted of hydrographic measurements (with samples for oxygen, chlorophyll, nutrients, and salinity) and zooplankton and larval fish sampling using MARMAP bongo tows.