endangered endangeredany species that is in danger of extinction Related Articles: Glossary: critical habitatGlossary: threatenedHot Topic- Passive Acoustic Monitoring Critical to Vaquita Conservation EffortsShip Quieting TechnologiesHot Topic- Killer Whales and Vessel NoiseChanges in Baleen Whale VocalizationsUsing Drones to Deploy Digital Acoustic TagsWest Indian ManateeHow is sound used to study marine mammal distribution?Blue Whale Chris Knowlton2017-02-26T20:09:58-05:00