Vintage jellyfish illustratiuon. Variety of jellyfish illustrated by French zoologist Henri Marie Ducrotay de Blainville in the first half of the 19. century. As other biologists of the time, De Blainville was gifted and attracted to both art and science. He went to study art at first but later decided to focus rather on biology. As biologist he still used his art skills and approach to illustrate objects of his works.