T rash pollution is a ubiquitous, global problem with well-documented effects on coastal communities and marine ecosystems (UNEP 2014; Rochman et al. 2016). Most trash found throughout watersheds and in lakes and oceans around the world originates from land (Rochman 2013). California is no exception, with trash collected during coastal cleanups dominated by single-use and plastic food containers and wrappers, tableware, bottles, bags, straws, and cigarette butts (CCC 2019), reflecting global trends (Ocean Conservancy 2020; Reddy