Nope i havent kept them personally,
But we've had them in at work, where ive had to looking after them.
Fascinating little critter's arnt they
For 10 years! your's has had a great life!
most of the customer's ive talked to who have
own'd them, their's usually live about 5-11 years.
So your doing great
i've read that the differance is the shape of the tail.one is rounded,the other is pointed.i don't remember which is which.and to me his tail looks half rounded and half pointed so i'm not sure which one he is.i'm very fond of him and i make sure whatever fish i keep won't harm him.