Related by context. Frequent words. (Click for all words.) 54 mammals 53 species 52 ocean ecosystems 51 leatherbacks 51 plankton 51 carnivores 51 marine ecosystems 51 fur seals 51 zooplankton 51 krill 50 tiger sharks 50 Humboldt squid 49 marine turtles 49 Humpback whales 49 coral reefs 49 dugongs 49 sea otters 49 leatherback 49 corals 49 critically endangered species 49 creatures 49 habitats 49 otters 49 sharks 49 Steller sea lions 48 habitat 48 copepods 48 reefs 48 herbivores 48 mammal 48 freshwater lakes 48 amphibians 47 amphibian species 47 flightless birds 47 ecosystems 47 invertebrates 47 lizards 47 salamanders 47 sea lions 47 predators 47 marine ecosystem 47 Komodo dragons 47 breeding colony 46 plover 46 carnivore 46 predation 46 invertebrate 46 giant tortoises 46 sea creatures 46 vertebrates 46 migratory fish 46 whales dolphins 46 manta rays 46 orange roughy 45 Sumatran tiger 45 vertebrate 45 whales 45 sea otter 45 rookery 45 aquatic insects 45 cetaceans 45 polar bears 45 biota 45 aquatic organisms 45 tadpoles 45 Extinct 45 Sumatran tigers 45 waterbirds 45 penguins 45 omnivores 45 jellyfish 45 overexploitation 45 marine mammals 45 aquatic species 45 seabirds 45 river otters 44 gannets 44 beluga whales 44 coral species 44 Overfishing 44 spawners 44 giant squid 44 groupers 44 biologists 44 marine organisms 44 coral reef 44 loggerhead turtles 44 gamefish 44 tigers 44 coastal ecosystems 44 sperm whales 44 habitat degradation 44 kelp 44 wintering grounds 44 lampreys 44 sea turtles 44 hammerheads 44 endangered species 44 insect populations 44 bull sharks 43 glaciers