Related by context. Frequent words. (Click for all words.) 59 freshwater ecosystems 56 coastal ecosystems 55 coastal waters 55 coral reefs 55 ocean ecosystems 55 coastlines 55 marine ecosystems 54 aquatic ecosystem 54 seagrasses 54 reefs 54 estuaries 53 oceans 53 kelp beds 53 aquatic ecosystems 53 marine ecosystem 53 longline fishing 53 coral reef ecosystems 52 seagrass beds 52 coral reef 52 endangered whales 52 marine biodiversity 52 ecologically sensitive areas 52 river deltas 51 aquatic organisms 51 shorelines 51 ecosystems 51 freshwater 51 fragile ecology 51 aquatic habitats 51 marine 50 waterways 50 ocean 50 sealife 50 freshwater lakes 50 fragile ecosystems 50 marine habitats 50 marine mammals 50 eelgrass 50 longlines 50 freshwater mussels 50 microscopic algae 50 eel grass 49 coral 49 marine organisms 49 seabed 49 corals 49 coastline 49 mangrove forests 49 intertidal 49 Willapa Bay 49 toxic algae blooms 49 marine ecology 49 wildlife habitats 48 Ocean acidification 48 tidal wetlands 48 marine sanctuaries 48 habitats 48 Sperm whales 48 estuary 48 dugongs 48 Bohai Sea 48 overfishing pollution 48 Invasive species 48 oyster reefs 48 reef 48 polluted runoff 48 barrier reef 48 ecologically fragile 47 fragile ecosystem 47 Overfishing 47 wetland habitats 47 Aleutian chain 47 Alaska Aleutian Islands 47 wetlands 47 filter feeders 47 coastal wetlands 47 estuarine 47 Whale sharks 47 marine invertebrates 47 boreal forest 47 seagrass 47 bowhead whales 47 tidal marsh 47 biodiversity 47 saltwater 47 aquatic habitat 47 wetland habitat 47 saltwater intrusion 47 Melting ice 47 shoreline 47 ecological 47 kelp forests 47 sea creatures 47 gillnets 47 underwater grasses 47 mangrove forest 46 Pacific Ocean 46 boreal forests 46 mangroves 46 caribou herds 46 forest ecosystems