Final answer:
When genetically modified fish mate with wild members of their species, it can result in the transfer of genetically modified DNA to the wild population, potentially impacting their genetics and the ecosystem. This could create 'super weeds' and displace other species.
Step-by-step explanation:
When genetically modified fish mate with wild members of their species, it can have several consequences for the wild species. One potential outcome is the transfer of genetically modified DNA to the wild population through hybridization. This could lead to changes in the genetics of the wild species, potentially impacting their populations and the larger ecosystem.
As an example, it can be noted that if a genetically modified trait, such as herbicide resistance, is passed on to the wild species, it could result in the creation of a 'super weed' that is difficult to control and may harm other plant and animal species.