clown fish.

How big are they?

 

How long has your tank been set up.

What is your salinity & ammonia at?

If the tank isnt completely cycled you might have put them in a bad soup mix

gl
craig

 

One of my clowns did the same thing when they were new to my tank. It took her probably a week or so before she would freely move about and eat. I don't know that it's "normal" but I wouldn't be alarmed by it either. As for the one fish dying, that could be a water quality issue, as Craig indicated. The state of the cycle / stability of the tank is the biggest question. I would check your levels.

As for leaving a single Clown, I wouldn't fret. They can live alone. You can always add another if you'd prefer. I added mine at different times and they get along great. I was advised to get one of a different size - to make the paring a littler smoother. My second clown was much smaller, which is now the male and the original larger one is the female. They paired pretty easily.

 

Then I wouldn't sweat it...as long as it's eating and happy. Ensure the tank stays stable and then add another clown in another week or so, if you want another.