Meet Phronima, the pram-pushing, barrel-riding parasite.
They take advantage of another sea creature called the Salp.
Salps are barrel-shaped zooplankton which drift throughout our oceans. 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 ocean while inside the Salp.