In phoresy, one organism attaches itself to another organism for the purpose of transportation. Barnacles, feonwxample cna not move on their own. They will attach them themselves to the shells and skin of other animals in order to gain transportation
I believe it is actually commensalism as only one of the organisms is actually deriving a benefit, for example Remora fish live on sharks and whales in order to clean them by eating particles attached to them
