I think one of the biggest problems is that the fishing nets are made out of thin plastic wire which then degrades over time and ultimately fragments into micro

I think one of the biggest problems is that the fishing nets are made out of thin plastic wire which then degrades over time and ultimately fragments into microscopic pieces of plastic that fish and other sea life end up eating. The reason they eat is is because the microscopic particles floats in the water column like "snow", just like all of the other tiny things that fish eat while they swim around.