Zooplankton in the Caroline Seamount area of the western tropical Pacific Ocean move up and down in the water every day, which affects how much carbon they help move through the ocean. Scientists found that different types of zooplankton move at different times and depths, with some staying deep underwater. The amount of oxygen and temperature of the water play a big role in where the zooplankton go. The area with the least oxygen acts as a barrier and a safe place for the zooplankton. Overall, the zooplankton in this area help move about 14.5 mg of carbon per square meter each day.