 They hide in the darkness of the ocean, avoiding predators and then swimming to the ocean's surface at night to feed.Plastics found in the stomachs of these fish were collected during "Malaspina's circumnavigation", a research project that studies the impact of global change on the oceans.A study conducted by Scripps Institution of Oceanography showed that the average plastic content in the stomachs of 141 mesopelagic fish over 27 different species was 9.2%.