6:19p.m. EST February 21, 2013
RENO -- Biologists are worried that Lake Tahoe's pristine blue water may be affected by a "giant" visitor.
Goldfish have inhabited the water of the Tahoe Keys since the 1990s, said Sudeep Chandra, a biologist at the University of Nevada, Reno.
But it wasn't until 2011 that biologists found a 14.2 inch, 3.4 pound goldfish in the lake. More "giant" goldfish have been found since, he said.
It is not entirely known how the goldfish are being introduced to Lake Tahoe. Chandra said he thinks people who have goldfish as pets are disposing of them in the lake.
According to the U.S. Forest Service's Lake Tahoe Basin Management Unit, warm-water fish, which include goldfish, have been seen in the lake over the last decade. The invasion of these warm species can be detrimental to the ecology within the lake.
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Source: USA Today
Location:Lake Tahoe, Reno, Nevada