Related by context. Frequent words. (Click for all words.) 56 hydrophone 53 hydrophones 51 radio transmitters 50 underwater 50 transmitters 48 sonars 47 longlines 46 pingers 45 sonar 45 toothed whales 45 Sperm whales 45 Whale sharks 45 GPS collars 45 Transmitters 45 transmitter 45 submersible 44 pinger 44 longline 44 ocean buoys 43 trawl nets 43 moray eels 43 radio collars 43 beaked whales 42 Chipped offAussies set 42 squids 42 autonomous underwater 42 temperature salinity 42 Humpback whales 42 radar altimeter 42 narwhals 42 Giant squid 42 dorsal fins 41 manta ray 41 tidal gauges 41 hammerhead sharks 41 Global Positioning System 41 Celebes Sea 40 DGPS 40 VHF radios 40 longline fishing 40 Oceanographers 40 reef sharks 40 beaked whale 40 torpedo tubes 40 Submersible 40 needlefish 40 interferometric 40 harbor porpoises 40 laser rangefinder 40 MBARI 39 mako shark 39 baited hooks 39 dolphins 39 homing device 39 sting rays 39 GPS locators 39 hydrothermal vent 39 radiometer 39 GPS trackers 39 scuba gear 39 Hoffmayer 39 turtles 39 blowholes 39 nearshore waters 39 geophones 39 underwater caves 39 jumbo squid 39 bathymetry 39 Mote Marine 39 French Frigate Shoals 38 dolphins whales 38 remotely operated 38 downrigger 38 Global Positioning Systems 38 seismometers 38 clownfish 38 Automatic Identification System 38 whales dolphins 38 spadefish 38 coelacanth 38 pectoral fins 38 baleen whales 38 marine biologists 38 fins 38 sperm whales 38 seahorses 38 robotic submarine 38 porpoises 38 Underwater robots 38 terrestrially 38 submersibles 38 marine mammals 38 oceanographers 38 lizards 38 Antarctic seas 38 TEDs 38 barracudas 37 snorkel 37 underwater robot 37 buoys 37 communicate wirelessly