I have had OLI for 5.5 years! And I've become SO attached to him, though I did not expect this: I am not an emotional person PLUS I'd NEVER had a pet/dealt with animals.I see. I guesstimate Irwins age because I inherited from my daughter who left for college.... She got him Sept 2014 and was told by pet store that he was 8 weeks. I got Irwin in June 2015 when my daighter brought him to me in a 10 gallon tank. I did research and found this awesome forum and I think I've done pretty good for him. I just love the lil guy!!!