Semi-interesting BBC article about isinglass(and finings in general)

[MickDundee]

And their declining use:
http://www.bbc.co.uk/news/uk-england-37350233

 

[Leon103]

Just use Irish moss instead

 

[Personal91]

gelatin and blood are other things that have been added to various brews...

 

[ericmark]

Is a fungus plant or animal? Not sure if they can eat yeast? Also the fish bits settle out, so are not in the final drink.