Cenedese certainly made this kind of aquarium sculptures, though there may be other companies which produced similar style pieces.
I have seen some with incised Cenedese marks, too.
No idea if all are based on a design by Alfredo Barbini...
When I visited Venice last year, I saw pieces identical to this one in the Cenedese store at St. Marcus square, alongside many other well known designs from past decades, like Antonio da Ros "Contrapunto" vases etc.
Michael