The enzyme from the marine microalga Thalassiosira pseudonana desaturates palmitic acid 16:0 to 16:1Delta11, whereas that from the leafroller moth Choristoneura rosaceana desaturates myristic acid 14:0 to 14:1Delta11.
On occasion, the presence of Dunaliella salina (a type of pink microalga commonly found in salt marshes) can give it a light pink tint.