Dead Snail...

[matman]

Is it ok to leave a dead snail in the tank as food for the shrimp? I wasnt sure if their being dead was going to release any bad chemicals or something.

also, one of my clownfish keeps going into this little cave like thing i have and just staring into it...

 

[Fluff]

If it were in a larger system, I'd leave it but, in a nano, I'd take it out. They won't release toxic chemicals, just might foul your water up a bit (ammonia).
Hard to say what the clown is doing. Some fish are just more curious than others.