Margaret Barnes (26 August 1919 – 30 October 2009) was a British marine biologist.
Originally trained in chemistry, during World War II, she worked on colloidal graphite lubricants.
Also in 1945, she married Harold Barnes, also a chemist who later pursued marine biology.
Barnes and her husband came to be recognized as world authorities on barnacle biology.
[2][3] Barnes was a founding member of the European Marine Biology Symposium and served as its president in 1988.