Brown algae are exclusively marine species

Brown algae are exclusively marine species. Knowing that longer(red) wavelengths of light are absorbed preferentially as lighttravels through water (water absorbs red light 90 times more thanblue light), what benefit might be conferred by the fucoxanthin inbrown algae and phyocoerythrin in red algae from species living indeep water? hint: considering which wavelengths are reflected andabsorbed by fucoxanathin and phycoerythrin.

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