Seriously though, there were so many makers of glass fish that it would need a catalogue or advert to place some of them. However, you could try Frank's
GlassZoo.info as there are a few there that are likely candidates. Often comparisons to the style of the fins and tail, and how they were crimped are good hints.
I really like these 'grotesque' fish and have a few myself that are inmates of the Glass Zoo.