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Now THAT'S green...

Now I knew there was a sloth/alga alliance where the latter grows on and camoflages the former, but THIS is impressive:

Sea slug steals genes for greens, makes chlorophyll like a plant
Animal shown to manufacture a key photosynthetic compound
By Susan Milius
February 13th, 2010; Vol.177 #4 (p. 10)

SEATTLE — It’s easy being green for a sea slug that has stolen enough genes to become the first animal shown to make chlorophyll like a plant.

Shaped like a leaf itself, the slug Elysia chlorotica already has a reputation for kidnapping the photosynthesizing organelles and some genes from algae. Now it turns out that the slug has acquired enough stolen goods to make an entire plant chemical-making pathway work inside an animal body, says Sidney K. Pierce of the University of South Florida in Tampa.

As usual, click on the link for the whole thing.