Educational Insights GeoSafari Plankton Net Toss the net into any natural body of water and sweep back and forth to collect plankton - microscopic organisms that live in water! Can be used in fresh or salt water! Can be held with hands or used with rope (not included) for docks and boats. Includes mesh plankton net, magnified bottle, laminated (waterproof) guide and plankton identification chart. Removable, magnified bottle enables kids to view their catches up close and share them with friends! Supports STEM learning and rewards scientific curiosity. Great introduction to the amazing world of marine biology. Net holes measure 333 microns (for catching zooplankton)