The highest levels of microplastics are seen at more than 650 feet below the surface. Anela Choy, who studies the things that deep-sea creatures eat, has resulted to often studying plastics; Over the years, plastic would show up again and again in the stomachs of certain fish. She, then, realised that the plastic must be going down to them.
According to Sarah Zhang, staff writer at The Atlantic, microplastics, tiny pieces less than five millimeters in size—have largely been studied as a problem...
https://safety4sea.com/more-microplastics-are-hidden-in-the-ocean-than-the-surface/