aqualung blue cay clear dipper dive diver fish frogman ledge nature ocean plunge recreation reef scuba diving sea sport water bathe crawl dip diving fin float girl holiday lake paddle pond pool skindive splash swim swimmer swimming waves adaptable appearance bird black-capped bright crest crested crested-tern fish-catcher freshwater greater-crested-tern perched perching plunge-diving river riverside saltwater seabird sunlight sunshine swift-tern tern thalasseus-bergii water-bird yellow-billed boy fins health man