US BUREAU OF RECLAMATION / ALEXANDER STEPHENS / SCIENCE PHOTO LIBRARY US BUREAU OF RECLAMATION / ALEXANDER STEPHENS / SCIENCE PHOTO LIBRARY
Quagga mussels (Dreissena rostriformis bugensis) in a water quality sample. This freshwater mussel is native to Eastern Europe. It was first detected in the US in 1989. It is an aggressive invasive species that kills and out-competes other mussels and alters the local environment. It is a prolific breeder, with females able to produce one million eggs per day. Its large colonies can block pipes and cause damage to infrastructure and boats. Photographed at Squaw Lake, California, USA.
Model release not required. Property release not required.