The marine ciliate <i>Mesodinium rubrum</i> is famous for its ability to acquire and exploit chloroplasts and other cell organelles from some cryptophyte algal species. We sequenced genomes and transcriptomes of free-swimming <i>Teleaulax amphioxeia</i>, as well as well-fed and starved <i>M. rubrum</i> in order to understand cellular processes upon sequestration under different prey and light ...