The water off that tidal flat looks murky for a reason. Red tide isn't rust or sediment — it's a bloom of microscopic algae, sometimes dense enough to change the color of the water entirely. Some species produce toxins. Fish kills. Shellfish closures. Dead zones where oxygen drops out and almost nothing survives. Nutrient runoff is one of the main drivers — fertilizer, sewage overflow, stormwater carrying nitrogen and phosphorus into coastal systems that can't process the load. The algae respond to that excess the way weeds respond to an over-fertilized lawn. The cargo ships anchored offshore in that hazy, discolored water aren't the cause, but they're a useful frame: these are working coastlines, stressed from a lot of directions at once. Red tide is one visible symptom. What's the closest estuary or bay to you? #redtide #harmfulalgalblooms #coastalwaters #waterquality #nutrientrunoff