Zebra mussels and killer shrimps are present in Cardiff Bay. These invasive species were probably introduced into the freshwater lake by a visiting vessel. Zebra mussels reproduce rapidly, and can cause problems to vessels and equipment if appropriate care is not taken.
Killer shrimps can cause serious ecological damage to freshwater ecosystems. It is the responsibility of all Bay users to help prevent the further spread of these species. It is an offence under the Wildlife and Countryside Act (1981) to allow these species to transfer to another body of water, and every measure should be taken to prevent this from happening.
Guidance on how to protect vessels and equipment, and prevent the spread of these species can be found at: