(Promo for the book “The Dragon Behind the Glass”; mentions Heiko Bleher)
https://www.nationalgeographic.com/news/2016/07/dragon-fish-most-expensive-arowana-emily-voigt/?cmpid=org=ngp::mc=crm-email::src=ngp::cmp=editorial::add=SpecialEdition_Escape_20200805&rid=B8921B1C61024DE7AC2AAFE395788D15