Yep, just darker in color.

Asian and black carp were brought here to control what our native fish don't eat in fish farms. There's a lot of farms along the MS river and it's tributaries. A lot of these farms have flooded over the years with run off into the rivers. Don't think your state has a hand in it? There are websites that show every fish farm in your state. There are websites that show every flood in your state. Just have to map them together.
Black carp eat a lot of snails and mussels. They both help clean our waters. We can't keep snails and mussels in MS. Some states have a limit you can keep.