Mongabay: Ocean acidification — driven by rising carbon dioxide levels in the atmosphere — may hurt the Humboldt squid, report researchers writing in the journal Proceedings of the National Academy of Sciences. Humboldt squid, also known as jumbo squid, are found in the eastern Pacific and can measure 8-feet long (2.5 meters) and weigh up to 110 pounds (50 kg). The species has made news recently as it has expanded its range northward from the tropical Pacific. Humboldt squid are now …