Charlotte ( `` Lotte '' ) Hildegard Hass ( née Baierl ; 6 November 1928 -- 14 January 2015 ) was the second wife of the Austrian naturalist and diving pioneer Hans Hass ( who died on 16 June 2013 , aged 94 ) and worked as an underwater model and actress in several of his underwater natural history films .
Charlotte ( `` Lotte '' ) Hildegard Hass ( née Baierl ; 6 November 1928 -- 14 January 2015 ) was the second wife of the Austrian naturalist and diving pioneer Hans Hass ( who died on 16 June 2013 ) . She worked as an underwater model and actress in several of his underwater natural history movies .