Fish Demo Tutorial Question

I just starting running through some tutorial action and came up with a question when playing with TGB. Can a static sprite and an animated sprite share the same class and / or datablock? I can create new animated fish sprites and assign them the FishDatablock or even the FishClass and they start swimming, but should I assign a static sprite either of these, it just sits there. Does anyone know if the engine supports using datablocks / classes across different "types" (static sprite, animated sprite, scroller)?