It depicts a 19th - century understanding of the sea with particular emphasis on the life and work of German biologist and researcher Ernst Haeckel .
Proteus is an animated documentary film written and directed by David Lebrun in 2004 .
Proteus depicts a 19th - century understanding of the sea with particular emphasis on the life and work of German biologist and researcher Ernst Haeckel .
Proteus is an animated documentary film written and directed by David Lebrun in 2004 .