I'm still fairly new to the hobby (3 years) and know that some of you have been doing this for decades! What is the longest lived fish you either own or have owned (RIP)? My amazing streak was 2 years...till my tank burst. Those were my zebra danios and bleeding heart tetras (favs). I apologize to them cause I put them through a lot. I now feel confident if I got an impressive specimen, such as a fire eel or oscar, I could keep it for it's whole lifespan and maximize its health and growth.