This artificial ash cliff is perhaps one of their last strongholds   have also found refuge around our fire stations, protected from tramping feet and sheltered from chemical sprays these rare plants thrive in the damp salty margins alongside the ash lagoons  all this within the boundaries with just a few of the country's coal fired power stations  but the need for sea walls of other coastal stations merely intake pipes to the coaling system, another world teams  this is not a plant, fan worms have flowerlike mouth parts used to filter food from the sea water  other worms use just two sticky tentacles to catch food   shrimps forage over closely packed sea  the delicate bodies of these printed vertebrates work as tiny water pumps, pulling water in one hole and pumping it through the other  here two barnacles feed in the gentle flow of water over the cooling pipes from the station  Marine life quickly packs the underwater structures and is about to become too thick and sometimes affect the performance of the machinery  barnacles belong to the same family as crabs and lobsters, but being in their adult life standing on their head which is fixed to the concrete  they use their feet to filter the water and kick food into their mouths  but if they can't move, how do they get there so quickly in the first place?