These plankton nets are mounted on the bumper bar of the ROPOS remotely operated vehicle, and are used to collect plankton above the hydrothermal vent sites. The nets are about 1 m (3.3 ft) long and have a mesh size of 63 microns (0.063 mm or 0.0025 in). Image courtesy of Submarine Ring of Fire 2004 Exploration, NOAA Vents Program.
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