Evidences accumulated over the last few decades reveal a growing human impact on marine ecosystems, but effects on biological communities are still largely unknown. Human activities such as fisheries, urban development, tourism, and maritime traffic, greatly influence distribution and quantity of marine litter from shores to deeper regions of continental margins, where may enter directly through a wide variety of maritime activities including disposal (e.g. clinker, sewage, chemical products or radioactive materials) and exploitation of natural resources (e.g. lost fishing gears, oil and gas, mining, pipelines). Any material discarded, disposed, or abandoned at the coast or even far inland can potentially become marine debris!