The polar planktonic foraminifer Neogloboquadrina pachyderma eats diatoms. Unlike other planktonic species, it also keeps the diatom chloroplasts (photosynthesising organelles) inside its cell. In benthic foraminifera, this is known as kleptoplasty, and the roles of these stolen chloroplasts are diverse. Their role in N. pachyderma needs to be investigated to find out if stored chloroplasts enable N. pachyderma to live in polar waters and under the ice, where no other planktonic species survive.