Higher trophic levels can also passively ingest microplastic during routine foraging behavior or mistake particles for natural food items (van Franeker et al., 2011 and Wright et al., 2013). However, microplastics are not the only material that poses such threats. Micro-sized artificial debris that is based on natural materials (e.g., natural or natural polymer fibers) is also ingested by organisms, though the reports are not very frequent.