animals background Balanus barnacles coast creature crustacea Great Britain limpet marine Mollusca natural nature Patella vulgata Pembrokeshire rock rocks sealife texture united kingdom wales welsh blue boulder cloud dwindle edge high icy July landscape margin melt mountains norway norwegian plants plateau retreat sky snow thick vegetation white cold cover deep far freezing remote ridge snowy summer wild bush cork Fir firs forest green ground hill hills hillside mountain pebble pebbles pine pines stone stones tree trees trunk wood woods bay Catalan catalonia Catalunya cliff coastline conifers costa brava cove headland mediterranean rocky sea seaside Spain view water woodland boats distance distant island islands isthmus land Maddalena pink rough rugged Sardinia shore shoreline spit bank beach plant Swansea terrain The Mumbles waves