Clam?

[Funky_Fish14]

If you had a baby clam that was still consuming large amounts of phyto, it would probably be alright for any species, but again water quality is an issue, as well, most of the clams that could survive under that light(I guess all but crocea, and maybe maxima) get fairly large. Derasas can still attain about 12-14 inches I believe, that would be quite the dedicated tank