Related by context. Frequent words. (Click for all words.) 79 marine ecosystem 73 coral reefs 73 ecosystems 70 reefs 64 biodiversity 64 corals 63 oceans 62 biosphere 62 fisheries 61 coral reef 59 estuaries 59 habitats 59 ocean acidification 58 marine mammals 58 plankton 57 acidification 57 species 56 phytoplankton 56 wildlife habitats 56 sea creatures 56 fishery 56 coral 55 overfishing 55 ecosystem 55 freshwater 54 reef 54 habitat 54 ecology 54 ecological 54 shorelines 53 fragile ecosystem 53 marine 52 wild salmon 52 organisms 52 mammals 52 atmospheric carbon dioxide 52 overfished 51 aquaculture 51 invertebrates 51 fauna 51 tropical forests 51 ocean 51 mangroves 51 coastal wetlands 51 watersheds 50 seabirds 50 oceanic 50 coastlines 50 glaciers 49 Biodiversity 49 estuary 49 krill 49 salinity 49 wildlife habitat 49 bluefin tuna 49 whales 49 aquatic 48 climate change 48 freshwater fish 48 invasive species 48 bio diversity 48 sea turtles 48 amphibians 47 rainforests 47 shellfish 47 bluefin 47 coastal waters 47 ocean currents 47 boreal forest 47 spawning grounds 47 Antarctic ice 47 salmon 47 mollusks 46 livelihoods 46 algae blooms 46 fish 46 waterways 46 wetlands 46 oceanography 46 polar regions 46 oceanographic 46 sediments 46 wildlife 45 bycatch 45 crustaceans 45 Ecosystem 45 sea otters 45 ecologically 45 Oceans 45 microbes 45 cyanobacteria 45 dissolved oxygen 44 porpoises 44 kelp 44 groundfish 44 IUCN 44 microorganisms 44 oceanographer 44 coastal erosion 44 marine mammal 44 Ecosystems