I got my very first snakehead ever on a purple plastic worm! So I think that is normal. They are ambush predators and hangout in the thickest weeds in less than 4 feet of water, looking for minnows and frogs to pounce on. The typical summer pattern is to throw topwater frogs over the weeds/pads in the morning. I have caught 4, 2 from my kayak and two from a bass boat. Caught them on plastic worm, orange wacky worm, buzz bait, and shallow crankbait......all while bass fishing. When targeting them, I have only gotten blowups on frogs with no hookups. So my advice....keep fishing for bass! You'll probably be more successful with incidental catches.
The mattawoman creek used to be full of them....and then all the bowfisherman came flooding in to target them at night. Some of them shoot so many they sell the meat to restaurants in DC!! Bass fisherman seem to blame the rise of the snakeheads on the lower weights and numbers of bass seen at the tournaments. But studies have shown very little bass in the stomachs of snakeheads.