This image of a large red shrimp was photographed by NOAA researchers. It was found near a cold seep. A cold seep, also known as a cold vent, is an area where hydrogen sulfide, methane and other hydrocarbon-rich fluid seepage occurs on the ocean floor, often in the form of a brine pool. Cold seeps frequently support large ecosystems of unique species that feed on bacteria that grow around the seeps. Mollusks, crustaceans, and other invertebrates are common around the seeps, including clams, crabs shrimps, and tube worms.