I bought my steamer clams yesterday, they've been in my fridge for just 24 hours. They were sitting on ice at the grocery store and at the time they were all closed. When I went to get them tonight, they were all partly (?) open with brown tongues sticking out and while they seem to be alive, because the tongue contracts when touched, they don't close up any more than they are already.
I've never cooked with clams before and don't really know if this is normal and they're fresh and fine or this means they've gone bad.