I just came across this really cool nudibranch which, due to it's feeding habits, would be a great candidate for a reef tank since it doesn't require any special food source. Here it is: http://www.seaslugforum.net/factsheet/solarpow
Lettuce leafs are photosynthetic and they are not.
They utilize the byproduct of the chlorophyl from their diet of a specific algae. The chloroplasts still require light but the slug cannot maintain this so they are constantly replacing it.
So the slugs are not photosynthetic but the chlorophyl they depend upon is.
And, they depend on a highly specialized diet.
Also, they are not real nudibranchs.
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