13954384 - Ophrydium protozoa, light micrograph13951920 - Common water crowfoot (Ranunculus aquatilis)13505604 - Submerged Yacare caiman13454711 - Estuaries and mangroves, Quirimbas, Mozambique13473734 - Couple watching the sunset over Lake Michigan, USA12256468 - Euglena, light micrograph13634328 - American alligator13505598 - Yacare caiman13502490 - Fresh water sold for oil production in the Permian Basin13634229 - Global water volumes, illustration12961120 - Ciliate protozoan,SEM13406202 - Smooth-coated otter13505603 - Feeding Yacare caiman13505599 - Yacare caiman13473732 - Man fishing on Lake Michigan, USA13454620 - Cannisters of freshwater for sale at a rural market13357327 - Waterfall, Ozark National Forest Park, Arkansas, USA13473733 - Father and daughter fishing on Lake Michigan, USA13673376 - Purple sunstar in Loch Leven, Scotland12650034 - American bur-reed12646524 - Morning Frost13954387 - Ophrydium protozoa, light micrograph12894683 - Salt marsh at low tide in an estuary12646523 - Morning Frost13951918 - Sea lamprey building a nest13633319 - Cathedral falls, West Virginia, USA13502488 - Fresh water sold for oil production12647130 - Little Mud Pond12647126 - Little Mud Pond12646492 - Lehigh River13505600 - Yacare caiman13502489 - Fresh water sold for oil production in the Permian Basin12961116 - Fresh water ciliate protozoan,SEM12647123 - Little Mud Pond12362491 - Paramecium multimicronucleatum, TEM12961138 - Ciliate protozoa,SEM12961088 - Ciliate protozoa,SEM12947987 - Gulf Stream disruption, illustration12947985 - Gulf Stream disruption, illustration12650032 - Lily Pond in the Poconos12647383 - Largemouth Bass (captive)13634230 - Global water volumes, illustration13525532 - Common water crowfoot (Ranunculus aquatilis)12652189 - Well Road Pond12647608 - Fog on the Lehigh River12651451 - Upper Lehigh River12649890 - Mullet Creek12961099 - Ciliate protozoan,SEM12652121 - Mountain Stream in Colorado12651721 - Upper Lehigh River12647611 - Bear Creek Waterfalls With Fog12646491 - Lehigh River13194983 - Underwater, abstract illustration12651719 - Lower Klondike Pond12651448 - Freshwater Wetland12650580 - Lower Susquehanna River12649889 - Neversink River Unique Area12647391 - Spring Ice Melt12974289 - Air bubbles in liquid12649891 - Mullet Falls12647610 - Bear Creek Waterfalls With Fog12644715 - Blue Mountain Lake13957624 - Koi fish swimming through lily pond, illustration12896811 - Oil slick on canal.12651718 - Upper Lehigh River12539490 - Storm clouds and Moon over Lake Manasarovar12947984 - Gulf Stream disruption, illustration12652191 - Shohola Falls12652190 - Shohola Falls12649945 - Laurel Hill Creek12647382 - Golden Rainbow Trout (captive)12298640 - Spirogyra sp., filamentous green alga, LM12651720 - Lower Klondike Pond12644730 - Delaware River12298477 - Ciliated protozoan (Paramecium sp.), SEM12651320 - Big Inlet Creek12647125 - Loyalsock Creek12643943 - Wood Duck13194945 - Underwater, abstract illustration12974286 - Air bubbles in liquid12961142 - Fresh water ciliate protozoan,SEM12896810 - Oil slick on canal.12654695 - Agua Caliente Park12652187 - Schrader Creek12647389 - Spring Ice Melt12644720 - Stuckys Pond13194944 - Underwater, abstract illustration12652188 - Schrader Creek12651385 - Common Loon12896815 - Algal pollution.12649948 - Laurel Hill Creek12647388 - Brook Trout (captive)12644746 - Silverthreat Falls12644713 - Raymondskill Creek12961077 - Ciliate protozoan,SEM12646493 - Frozen Gouldsboro Lake at sunset12583441 - Young children pumping water from a well, Ganta, Liberia12961150 - Ciliate protozoa,SEM12947988 - Gulf Stream disruption, illustrationpage suivante