Went to Sippo lake around 6pm on Tuesday. Caught a number of bluegill, 2 very small bass and one cat fish. The cat fish took a top water Rapala near the weeds. The lake had a green cast. There was some type of vegetation floating in the water. Looked like grass clippings suspended below the water. No one from the park seemed to know what it was. They said it appeared about a week ago after a storm.