USGS monitors growth rates of Elkhorn Coral
![Photo of a small concrete block; a disk attached to the top holds a small growing coral.](https://d9-wret.s3.us-west-2.amazonaws.com/assets/palladium/production/s3fs-public/styles/full_width/public/thumbnails/image/Apal_DRTO_04_2017.jpeg?itok=d335bDJS)
Detailed Description
USGS monitors the growth rates of the threatened Elkhorn Coral (Acropora palmata) at Dry Tortugas National Park (pictured) and throughout the Florida Keys, U.S.A.
Sources/Usage
Public Domain.