Animal • Apex • Aquatic • Atmosphere • Birds • Cell • Characterized • Chemosynthesis • Classified • Compared • Consuming • Core • Cycle • Dead • Diatoms • Differ • Dominate • Drift • Dwelling • Ecosystem • Energy • Feed • Following • Food • Found • Geothermal • Groups • Helping • Holoplankton • Inhabit • Into • Land • Like • Lives • Microscopic • Oceans • Oxygen • Plankton • Primary • Refers • Rely • Silica • Small • Species • Spend • Stage • Starfish • Use • Water • Zooplankton