I know exactly what you mean, rubbish is one of the most disgusting things that ruins our fisheries, not to mention the environment, AND! people can prevent it!
I remember seing a small eel come up to the bank on te Waiau river with a plastic bag choking it i couldn’t get the bag out so i went and got a rock to kill it
and when i got back it was already dead [If someone came up to me and said ‘O’ well its just a stupid old eel” i honestly would have cracked THEM over the head!]. Its one of those disgusting things that you can’t do much about except pick up your own rubbish and any other junk you see.