More detail trickling through..some extra info in the BBC news story..
"Lesley Coupar, from the zoo, told BBC Scotland that the alarm went off and the owners went to see that the reptile house, a corrugated iron building, was ablaze.
She said a "substantial" number of reptiles and insects had died, although the house was partially closed and not all the reptiles were being housed there.
Ms Coupar said: "The reptile house is a shell and I don't think there is anything that has survived the blaze.
"It was obviously extremely ferocious and everything has perished that was in the reptile house.
"Otters and meerkats were housed near to the blaze and the crocodiles. We do know that the crocodiles have survived, they were submerged in water in their pond.
"Unfortunately one otter died but the other one, we hope, will survive. It is under supervision as we speak."
She said there was no indication what caused the fire."
I hope the Springhaas wasn't in there. Well obviously I hope as few animals as possible were in there but she is a particular favourite of mine. This is the tropical house they were just finishing off months of work on, re-doing the whole thing. The guy in charge of the work was due to go to Trinidad shortly to collect new species for the new enclosures (according to the thread about the work on the reptile UK forum).