Three to four thousand non-native goldfish have invaded Boulder’s Teller Lake #5 as the likely result of unwanted pet dumping; officials are now trying to determine a plan to remove the invasive fish before further damage to the ecosystem can occur.

Thousands of goldfish are invading a Colorado Lake, threatening the health of native animals and plants. 

Rangers first noticed the estimated three to four thousand exotic fish swimming in Boulder’s Teller Lake #5 in March. 

The entire population is thought to have originated from four or five pet goldfish. It’s estimated that 2 years have passed since they were tossed into the lake. 

Due to the danger