Nasal speculum

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