An official website of the United States government.								Here's how you know we're official.				

##### dot gov icon**Official websites use .gov**

A **.gov** website belongs to an official government organization in the United States.

##### https icon**Secure websites use HTTPS**

A small lock or **https://** means you’ve safely connected to a .gov website. Share sensitive information only on official, secure websites.

National Ocean ServiceNational Oceanic and Atmospheric Administration

              -  Home 
              -  Ocean Facts 
              -  TOPICS ****                  - Explore All Topics
                - Careers
                - Economy
                - Ecosystems
                - Geodesy
                - Hazards
                - Navigation
                - Observations
                - Ocean
                - Recreation
                - Sea Level Rise 
                - Story Maps
                - Tools 
              -  Education 
              -  News 
              -  Podcasts 
              -  Video 
              -  Images 
              -  About Us 

HomeNews

# #ScienceAtSea

# Finding Fish Hotspots and Mapping Coral Reefs

*Click on graphic to enlarge.* | ** Download this infographic.

----

While scientists use many different methods to map what lies beneath the waves, two of the most important tools are sonar and video.

          - Multibeam and Fish Sonar:  Some NOAA ships are equipped with high-tech sonar systems that use sound to efficiently map large swaths of the ocean. Multibeam sonar is used to 'paint the seafloor with sound' to create highly detailed maps. Scientific grade fish acoustic sonar is used to map where fish and other objects are located in the water column.
          - Autonomous Ocean 'Robots' Collect Data:  Gliders are used for many things, from collecting ocean characteristics such as temperature, to finding where fish are spawning by recording underwater sounds. Once these torpedo-shaped vehicles are launched, they operate independently and report their findings back to the ship.
          - Remotely Operated Vehicles Collect Video:  While sound (sonar) is a great way to create detailed underwater maps of large areas of the ocean, remotely operated vehicles (ROVs) are used to take a closer look at what lies below. ROVs equipped with mounted cameras help scientists confirm fish species, find out if corals are healthy, and identify specific objects. 
          - How is this information used:  The maps created with these tools allow people to visualize the seafloor, coral reef ecosystems, and fish populations in amazing detail. These data are used to update nautical charts, to help preserve and protect underwater ecosystems, and to simply better understand what lies beneath the waves. 
          Get **Social**More **Information**- National Centers for Coastal Ocean Science
- Coral Reef Conservation Program 
- Office of Coast Survey 
- NOAA National Geophysical Data Center's Online Water Column Sonar Data viewer 

Did you know?

Even if you live far from coral reefs, you can have an impact on reef health and conservation.Find out how. 

          - Provide Feedback 
-  Contact Us 
-  Report an error 
Science. Service.Stewardship.						About NOS 					- About Us
- NOS Program Offices
- Media Inquiries
- Website Acknowledgements
						Resources 					- Site Index
- Disclaimer
- Freedom of Information Act
- Accessibility
						More Resources 					- Information Quality
- Privacy Policy
- NOS For Employees
- USA.gov
-  National Ocean Service
-  National Oceanic and Atmospheric Administration
-  Department of Commerce
						Social 					- 
- 
- 
- 
-