seawater (e.g., Cellvibrionaceae, Phycisphaeraceae, and Puniceicoccaceae) have previously been reported to metabolize diverse organic substrates or colonize plastic surfaces in marine environments. Our findings highlight the need to explore the microbial species and metabolic pathways underlying plastic biodegradation in the ocean in more detail. Foaming can substantially reduce the environmental lifetimes of bioplastic drinking straws.