What are Invasive mussels?
Zebra and Quagga mussels are a small, destructive invasive species that can spread across Texas by hitching a ride on boats and trailers. They grow to only about 1 ½ inches and develop a distinctive zebra-striped shell. One zebra or quagga mussel can produce up to one million microscopic larvae per year. Invasive mussels can cause tremendous environmental and economic damage – hurting aquatic life, damaging your boat, hindering water recreation and even threatening your water supply.
Where are Invasive mussels?
The following Texas lakes are classified as “infested” with zebra mussels: Amistad, Austin, Belton, Bridgeport, Brownwood, Buchanan, Canyon, Dean Gilbert (a 45-acre Community Fishing Lake in Sherman), Diversion (private lake downstream of Medina Lake), Eagle Mountain, Georgetown, Granger, Grapevine, Hords Creek, Inks, Lady Bird, Lewisville, Livingston, Lyndon B. Johnson, Marble Falls, Medina, O.H. Ivie, Pflugerville, Placid, Randell (local Denison access only), Ray Roberts, Richland Chambers, Stillhouse Hollow, Texoma, Travis, Walter E. Long, and Worth. Invasive mussels or their larvae have been detected on multiple occasions in several lakes, which are designated as “positive.” Lakes Dunlap, Fishing Hole, Lavon, and McQueeney, as well as river reaches downstream on the Colorado, Guadalupe, Lampasas, Leon, Little, Red, and Trinity rivers, are classified as “positive” for zebra mussels and Lake Amistad is currently classified as “positive” for quagga mussels in addition to being “infested” for zebra mussels. Lake Ray Hubbard is classified as “suspect” for zebra mussels. View map.
CLEAN Clean your boat, trailer and gear by removing all plants, animals and foreign objects. |
DRAIN Drain all water from the boat, including the motor, bilge, live wells and bait buckets, before leaving the lake. |
DRY Dry the boat and trailer for a week or more before entering another water body. If unable to let it dry for at least a week, wash it with a high-pressure washer and hot (at least 140-degree), soapy water. |
Transporting Invasive mussels is illegal
Possession or transportation of zebra or quagga mussels in Texas is a Class C misdemeanor for the first offense, punishable by a fine of up to $500. Repeat offenses can be elevated to a Class B misdemeanor, punishable by a fine of up to $2,000, jail time up to 180 days, or both.
Boaters are required to drain all water from their vessel, including live wells, bilges, motors, and any other receptacles, before approaching or leaving a water body. This applies to all types and sizes of boats used on fresh waters, effective July 1.
Learn more about regulations related to zebra and quagga mussels.