Not just sea life: Migratory fish, birds and mammals also fall foul of plastic

In major freshwater systems, marine mammals are particularly at risk from drowning following entanglement in discarded fishing gear. The report cites the Ganges river dolphin (Platanista gangetica), of which an estimated 3,500 remain, and the Mekong population of Irrawaddy dolphins (Orcaella brevirostris), which numbers less than 100, as particularly vulnerable.