Photo By/Credit

Patterson, Matthew/USFWS

Date Shot/Created
01/29/2015
Media Usage Rights/License
Public Domain
Image
A nasal speculum modified for checking gravidity in freshwater mussels. Squeezing the handles spreads the blades apart and opens the shell. Photo: Matthew Patterson, USFWS.
Subject tags
Work of the Service
Science
Rivers and streams
Restoration
Research
Freshwater mussels
Equipment
Ecosystem recovery
Aquaculture