U.S. Marine Corps photo by Lance Cpl. Christopher Johns/Released 140122-M-OB827-005.JPG
Jan 31, 2014
A ruler stands secured to a pole over a vernal pool in a fenced in area aboard Marine Corps Air Station Miramar, Calif., Jan. 22. Rulers like this are used to measure the depth of vernal pools where two endangered species of fairy shrimp can be found. Without water, the fairy shrimp lay dormant in the ground until the pool fills again.
CAMERA
N/A
LENS
APERTURE
SHUTTERSPEED
ISO
No camera details available.
This photograph is considered public domain and has been cleared for release. If you would like to republish please give the photographer appropriate credit. Further, any commercial or non-commercial use of this photograph or any other DoD image must be made in compliance with guidance found at https://www.dimoc.mil/resources/limitations, which pertains to intellectual property restrictions (e.g., copyright and trademark, including the use of official emblems, insignia, names and slogans), warnings regarding use of images of identifiable personnel, appearance of endorsement, and related matters.