The inland silverside (&quot;Menidia beryllina&quot;) was introduced from Lake Texoma, Oklahoma, into the Blue Lakes and Clear Lake in 1967 to test its effectiveness in controlling the Clear Lake gnat and chironomid midges. About 6,000 fish were released in Upper Blue Lake and 3,000 in Lower Blue Lake and Clear Lake. Within a year the silversides were abundant in Lower Blue Lake and Clear Lake.

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