we have got a deformed golden orfe, did have two, but one died last year - never heard of anyone else having one. It is quite old, as in around 20 years plus, and over 12 inches long - have no idea how long they live for - ours happened when my father put some chemical in to kill the blanket weed, misread the instructions and put in too much, and we put it down to that. But we also have absolutely loads of frogs.....interesting. We have around 30 large fish, but also a large pond around 18ft x 6ft - having problem with the sun turning the water green at the minute though.