Well I've only had one and its was probably ten years ago, but she was pretty tough. They don't tolerate many medications though, as long as your not keeping him with other display fish that shouldn't matter, but if you ever treat the tank for something read up on it very carefullly. I had one of the clarkii blue lobsters, which is just a fancy color morph, but i don't know if the fancy color variations are any more fragile due to breeding practices. May have o start another thread or do a little deeper research online, like i said it's been years since I had one.