alive animal aquarium aquatic arms biology brown bumps coast coastal coastline conservation coral creature echinoderms endoskeletons environment environmental fish five five-arms life marine nature ocean outer-shell pitted pool rock rockpool rough sand save sea sea-creatures seashore seastar shapes star starfish surface textures tide tidepool tube-feet underwater water wild wildlife adults afternoon bathers bathing bathing-costumes bathing-suits beach beach-towels bikinis children clothes clothing cool cooling currents enjoyment families family friends fun hot men outdoors outing outside people public relaxation relaxing safety safety-flags summer sun sunbathing sunlight sunshine suntan surf swimmers swimming tourists towels warm waves wet women