Related by context. Frequent words. (Click for all words.) 69 species 62 invasive species 61 invertebrates 61 habitats 60 estuaries 59 amphibians 59 organisms 58 reefs 58 ecosystems 58 freshwater 57 freshwater fish 57 habitat 56 marine ecosystems 56 marine ecosystem 55 coral reefs 55 corals 55 wetlands 54 bird species 54 fauna 54 mussels 54 zebra mussels 54 fish 53 sea creatures 53 dissolved oxygen 53 mollusks 53 aquatic 52 microorganisms 52 salinity 52 sea otters 52 wetland 52 otters 52 biodiversity 52 micro organisms 52 sea turtles 51 waterways 51 mammals 51 manatees 51 saltwater 51 shorebirds 50 waterfowl 50 endangered species 50 coral 50 fisheries 50 seabirds 50 turtles 50 algae 49 estuary 49 cormorants 49 wildlife 49 lakes 49 insects 49 tadpoles 48 plankton 48 crustaceans 48 shellfish 48 aquaculture 48 sturgeon 48 coastal wetlands 48 wildlife habitats 48 milfoil 48 wildlife habitat 48 eels 47 frogs 47 flora 47 vegetation 47 salt marsh 47 marine mammals 47 coastal waters 47 bald eagles 47 critters 47 acidification 47 amphibian 47 ecosystem 47 microbes 47 larval 47 algal 47 watersheds 47 contaminants 47 creatures 47 sedimentation 47 salamanders 46 crabs 46 snails 46 mussel 46 cyanobacteria 46 Species 46 migratory birds 46 reptiles 46 algae blooms 46 birds 46 krill 46 brook trout 46 fishes 46 oysters 46 pathogens 46 fishery 46 shorelines 46 lionfish 45 crayfish 45 bio diversity 45 biosphere