Saltwater
Ex QOTB
I think Australia started the genocide of its cats based on a similar justification.
Polish institute classifies cats as alien invasive species
WARSAW, Poland (AP) — A respected Polish scientific institute has classified domestic cats as an “invasive alien species,” citing the damage they cause to birds and other wildlife. Some cat lovers have reacted emotionally to this month's decision and put the key scientist behind it on the defensive.
apnews.com