MVP Disc Sports Black Hole Micro Disc Golf Basket

Can I use this as decor in my aquarium?

Where do I find disc to fit with this basket?

If I wanted to mount this to a board by drilling a hole for the bottom post, does the base come off in any way?

Do you think this basket would hold a small cake on the top (with another cake under it)? thank you! my brother is pdga #117 and he is turning 70