Bummer deal man, sorry for your loss. IME I found that Orinos seem to stress out the most out of all the different cichla I have during transporting, I've even lost two healthy strong fish (Orino's) like yours from a simple quick move from one tank to a next side by side... They seem to stress out BAD when having to be caught and netted- I try not to move them around too much anymore due to this - However if I must move an Orino the key for me seems to net them before their even aware your after them and net them first if others are to be transferred. I've been successful using a huge net (one of those huge catfish nets you can buy in sports stores) ....You want to avoid the cat and mouse game when trying to catch him, this makes him aware your after him and they tend to stress out very bad during this time...You want to Swipe the Orino up quick in one shot with the net before he even knows whats going on, try to avoid putting him into a container if possible and transport directly to the new aquarium, pond or pool ASAP. For me this method has worked the best without losing one yet, but it cost me two Orinos to learn this - Just my two cents -
