We have this invasive plant called hydrilla that has taken over about a third of Lake Austin, last I looked at least. It forms this mass of what sort of looks like seaweed that floats close to the surface in huge matts. The best thing they have found to combat it is asian grass carp, which feed on it. They've released a bunch of these fish into Lake Austin in an attempt to get control over the hydrilla.

The problem is the drought they are experiencing in central Texas. Lake Travis feeds Lake Austin, but because Travis is so low the temperature in Lake Austin is over 10 degrees warmer. That caused an explosion of hydrilla this and last year. It's a mess.