what did you feed the antenna ray? they have been hard to keep alive here in the US, I dont' know of anyone keeping them alive long term.
unfortunately the website is now closed, but in Switzerland some time ago, there was an iwamae pup born.
here is a picture
View attachment 717380
Here it is: http://www.amazonasrochen.ch/page/rochen/arten/blacktailedantenna.htm
He lives in Ostria, not germany.![]()