Shirley Winifred Jeffrey (4 April 1930 – 4 January 2014) was an Australian marine biologist and naturalist, who researched biochemical separation techniques, specialising in micro-algal research; her discovery, isolation and purification of chlorophyll c allowed for the evaluation of oceanic microscopic plant biomass and photosynthesis.
She was christened The Mother of chlorophyll c by one of her early mentors, Professor Andy Benson of the Scripps Research Institute in San Diego.