
This is what it looks like when you empty your holding tank in your slip. Everyone can tell it was you. Please stop.
Edit: I'm going to leave this here, or if anyone has a better resource please post it
https://cms.santamonicabay.org/wp-content/uploads/2019/09/when-nature-calls_FINAL_2019_for-web.pdf
Edit 2: for the "Ackshually pollen" crowd, visible bits of ground up toilet paper can be seen both in the pic and in person. If you have these "pollen" slicks in your marina I suggest looking a bit more closely at them before diving in.
Nothing else makes this specific "poop slick" on the water, and it takes days to go away. This is untreated human waste dumped directly into the marina I work in, I see it every day.
Its illegal. Also, divers clean bottoms, kids swim off boats here. People live here.
Everyone can see which boat did it. "Oh the wind will take it away". Guess what. Your neighbor downwind knows it wasnt him. Its super obvious, all your neighbors see it and know where it came from.
Please stop macerating and dumping your "black water" in the marina. /rant