This vase is made by the Australian glass artist James Dodson. He trained at the Jam Factory in Adelaide (1981-82) and at Orrefors glass school before setting up near Launceston in Tasmania. He is best known for his colourful small birds, fish and other animals.
Another discussion on the GMB shows several examples of his fish and of his signature.
His business called Tasmanian Glassblowers has
a website. The vase in question may be found by following the links Gallery > Speciality Items > Flower Vases.
Lest it be thought he only makes small items, the platter in the image below is 43 cm across and signed "JA Dodson 10/86" (signature shown in Reply #14 of the other thread).
Trevor