(NNCNOW.com) -- The DNR is very concerned that two zebra mussel larvae have been found in a popular Northern Minnesota inland fishing lake. After samples were taken from five different sites on Lake Winnibi-go-shish, the two larvae or veligers as they're known, were found in an area near the middle of the lake. Larvae are described as baby zebra mussles, which grow to adult zebra mussles after only a few weeks. DNR officials say that it's hard to pinpoint where the veligers came from but it is likely there are reproducing zebra mussels in the lake, which creates issues for connecting bodies of water. "Eventually there will be enough veligers in the lake that they will start flowing downstream into the Mississippi River in enough numbers that some of the downstream lakes that the Mississippi River flows into, may begin to see their own populations," said Gary Montz, a DNR research scientist for aquatic vertebrates. The DNR plans to do more sampling on the lake this Summer.