Here is a two-part quiz: What is a bucket biologist? A bucket biologist, sometimes called a bucket stocker, is a person who surreptitiously introduces a non-native, or invasive, species of fish into a Maine body of water. Maine authorities have never caught or successfully prosecuted an illegal bucket stocker, according to Greg Sirpis, chairman of Operation Game Thief. The takeaway is that even if a bucket stocker were brought to court, a successful prosecution under the current circumstances would be unlikely. By any name, bucket biologists and kennel biologists both represent a serious threat to the integrity of Maine’s fish and game management process.