Just saw this Obituary for Axelrod. He died May 15, 2017.
One of the Pioneers.
http://www.practicalfishkeeping.co.uk/news/fishkeeping-news/articles/2017/5/30/obituary-dr-herbert-r-axelrod?utm_source=OracleResponsys&utm_medium=email&utm_campaign=PFI-E-B-170607-NEWSL-ENG-NEW (http://www.practicalfishkeeping.co.uk/news/fishkeeping-news/articles/2017/5/30/obituary-dr-herbert-r-axelrod?utm_source=OracleResponsys&utm_medium=email&utm_campaign=PFI-E-B-170607-NEWSL-ENG-NEW)