I know there was a sticker at the bottom that has come off stating it was Murano. Approximately the length is 10 inches, Height 5inches and depth 3 inches. There is an A symbol I think in glass but I’m not sure if it is a marking or just the way the glass is blown. Right corner of the aquarium under the orange fish. Hope this helps . Thank you.

Absolutely, yes thanks!
Based on the photographs and information provided and subject to examination, this is:

A hand-blown art glass "aquarium"
unattributed maker, Murano, Italy, mid 20th Century
5 inches by 10 inches by 3 inches
$150-200*
*represents a fair-market value for auction purposes; retail or asking price may vary.