BLUE DRAGON (Glaucus atlanticus). A small peacic slug that measures only about 2 cm and is generally associated with the Portuguese frigatebird (Physalia physalis) or the blue button (Porpita porpita) on which it feeds. They can also appear in intertidal pools. Marine invertebrates of the Canary Islands, Tenerife.

porpita porpita glaucus atlanticus adult group float high angle view overview underwater shot blue tenerife temperate sea low tide biodiversity top view sand shore october macaronesia water surface blue button porpita porpita porpita pelagos neuston nobody glaucus blue glaucus glaucus atlanticus several species adults groups floating high angle shot overhead shots overhead shot overhead sight overhead sights overhead view overhead views overviews global sight global sights full length subaquatic photos subaquatic sights seen under the water photos under the water underwater shots subaquatic image underwater view submarine images submarine sights submarine sight submarine photos submarine photo underwater views submarine photographies submarine photography underwater underwaterphoto underwaterpicture underwaterphotography underwaterphotographies underwaterphotos underwaterpictures teneriffe temperate seas temperate ocean temperate oceans low tides ebb biodiversities biological diversity biological diversities top views top sight top sights view from above top shot sandy shore sand shores sandy shores water surfaces watersurface watersurfaces with nobody sea swallow glaucus atlanticus blue dragon glaucus atlanticus different species stage of development individual enumeration shot colour canary islands archipelago spain european union europe sea marine area area tide meteorological phenomenon atmosphere environment strand north atlantic ocean atlantic ocean world sea and ocean water matter matter substance hydridae family cnidaria wild animal porpitidae capitata anthoathecatae hydrozoa medusozoa cnidaria radiata metazoa opisthokonta eukaryota aquatic species species particularity species glaucidae nudibranchia opisthobranchia heterobranchia gastropoda conchifera mollusca inarticulata protostomia coelomata bilateria nudibranch sea slug gastropod mollusk