Cattails! In Texas they can literally take over a pond if the soil is sandy or loose. This can limit you from fishing from the bank in many places, they are also snake havens. However, from a fishing standpoint, they are great. Like Texas 715 said you can have some of your best catches in these areas. Fish will position themselves right at the edge of the Cattails for an easy meal, they also like the cover and shade that they provide. You can flip or pitch a worm or tube on the edge or even one to two feet back into them and catch some really nice fish. I just wish there was a better way to control them, they seem to just keep spreading.