A somewhat related question since it involves inhabitants in the same part of the zoo: Do you remember seeing any Mediterranean parrotfish? Admittedly I'm not completely sure they're on exhibit and I'm not even sure they still have it (they had 4 in December 2012, according to their inventory). Though not as rare in European aquaria as suggested by zootierliste, I was still hoping to see it in the Mediterranean tank (near the large coral reef tank) but failed
I don't remember seeing any parrotfish in the Mediterranean tank (though there was one in the tropical tank). Mediterranean tank had morays, mullet, wrasse etc and a large spider crab but no parrotfish that I recall.