Dear lord we are still talking about lettuce.. We are not fish. Not even close to fish. Fish are not humans. Not even close. There is no comparing at all. What our bodies and their bodies do are not even close. Do you see us finding the needs to eat algae even though we can find nutrients from it. No.. Give them what they eat. Not what we eat. Can we at least digest that into our brains. Yes! Yay, no more lettuce talk woooo!No one can really digest cellulose... but still we eat it and derive nutrition from it.