The fins on the backs of the fish are different to my WF fishy vase - the one with the whale thing on the other side - the WF fins are simply a cut line, similar to the tail bits.
These are a bit more sophisticated than WF.
I've just checked some fish glasses from Krosno (contemporary - TKMaxx)with shoals of cut fish swimming around too - and again, the fins are less sophisticated than these.
Added to this the bubbles, I'd agree it's something rather nice, but don't know more, sorry.