“Salps are barrel-shaped, gelatinous zooplankton which drift throughout our oceans. They may occur individually or in huge chains composed of individual salps linked together. Phronima attack these vulnerable creatures and make them their hosts. Equipped with impressive front claws, Phronima carves away their insides to leave an empty barrel structure. It then climbs inside and sails the sea from within, feeding off food and water on the go”