purple sea slug nudibranc flabellina affinis

adriatic affinis alicante ambient animal aquatic atlantic atromaculata beauty biology branchiae cave close color colorful colourful detail diving europe fauna felimare flabelina flabellina gills life little living macro makro marine mediterranean mollusc nature nudibranch nudiebranch ocean outdoors purple reef scuba sea slug snail spots thailand underwater vibrant water wild wildlife