Been fishing the lower Detroit River for over 50 years and I never caught anything like the fish I hooked into On Friday. My brother and I were perch fishing near Grosse Ile and I pulled in a nice size fish with black blotches. It looked like a group, but obviously that wasn't possible. Although I always release any bass I inadvertently catch when perch fishing, I kept this one in case it was an invasive species or sick. Got home and found similar fish on Google, basically the fish is a bass with 'melanosis'. Here's a link to a Missouri Natural Resources info page: https://huntfish.mdc.mo.gov/fishing/fish-diseases/melanosis-black-spot-blotchy-bass Hope I never catch one again!