Don’t Want That Goldfish Anymore? Don’t Put It Outdoors!

Massive pet goldfish found in the wild at Presque Isle, Erie PA, 2025 (photo of Corey Ketchum/USFWS holding a goldfish found during an electrofishing survey in Presque Isle, PA. Photo by Matt Basista/USFWS) 4 May 2026 This goldfish looks familiar. Someone didn’t want it or couldn’t keep it anymore so they dropped it off in the nearest waterway to let it “swim free.” Big mistake. The goldfish above was found at Presque Isle State Park but I’ve seen them this big in Schenley Park’s Panther Hollow Lake. Goldfish are in the carp family (Cyprinidae) and live 12-20 years. Awww, but it was so tiny when I bought it! Not anymore. During their long lifetime goldfish reach 6-10 inches in a tank but grow much bigger outdoors where they can weigh up to 4 pounds! Your pet store goldfish after two years in the wild: ‘Call me Megalodon.’ [an extinct giant shark] This goldfish isn’t supposed to be here. But someone released it, thinking they were being kind. Instead, they created an invasive problem…