Permits or licenses are required that allow a review of the proposed activity, site and species for adverse affects and unwanted releases. In most cases, exotic species are not allowed to be grown or maintained where escapes are possible or local populations may be infected. Genetically altered organisms which are sterile may also help to reduce risks, but not eliminate them completely. Policies and regulations need to be updated as new information is discovered. To find out about New England states' programs see policies and regulations.
Individuals can also help, by never releasing any plants or animals to the environment.
Ask your dealer about the species you purchase, and share your concern about preventing unwanted introductions. Do not release organisms purchased from pet and aquarium stores to the wild.