First off.. I am sorry for your loss.
Secondly.. I love your avatar!!
I know you said non-fish related..but this is fake, so it won't die
check it out...http://www.craftster.org/forum/index.php?board=4;action=display;threadid=18
How about a terrarium? Are you good with itty bitty plants? Hmm... a rock garden? Very peaceful...
Totally out of season.. but a snowman.. I am sure you could think of similar...none the less, the frosted spray paint could assist you in your venture, either way.http://www.craftster.org/forum/index.php?topic=3640.0
A candle display. The globe shape of the bowl would created a beautiful orb effect on your walls.. small, varying shaped pillar perhaps?
You could make a giant gel candle... inset some glassblown fish, so you can reuse them, even after you burn the candle away..
Clay pot cookie jar... terra cotta pot with saucer, glass fish bowl & E6000 glue! Turn your pot upside down.. paint, stencil, decorate the pot & saucer.. then with the E6000, glue the fishbowl to the bottom of the turned over pot. Then, use the saucer, as a lid!
Attach a ball of clay, handle, or giant bead, for a handle.