There are an estimated 5 trillion plastic particles in the oceans, spelling trouble for marine ecosystems. Manta rays are one group of species at risk – how can we protect these animals? In this episode of 'Tales from my PhD', Charlotte Collingwood talks to Jessica Savage about her work analysing the species distribution of manta rays and global plastic pollution maps to aid marine science and conservation.

• Follow Jessica on Twitter: @Jessicasavage29
• Follow Charlotte on Twitter: @NeuroCharlotte

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Produced by: Charlotte Collingwood

Music by: Joseph Sandy