There are bacteria that can live in sand that glow when disturbed (like when a nassarius snail emerges from the sand). I remember a guy on here a few years ago that was selling cups of sand to seed tanks. Not sure what happened to him. I've personally seen it at the beach walking at night when the footprints I leave glowed behind me.
And from what I've heard those flame scallops listed above don't fare well in captivity.
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