I once was asked by a kindergartner if clams sleep. I was stumped, and we actually have no idea! We know many bivalves have strong biological clocks, often showing circadian rhythms in activity. But as to whether they sleep? No one knows! #clamFacts
Is there a consciousness that has different states? Do clams wake up, might be a better question. Maybe clams dream 24/7. Endlessly becoming butterflies. Or writing Taoist sutras.