Some sponges do quite well in aquariums... typically the ones that grow under the rocks where you don't see them until you doing some rearanging. Pretty decorative sponges are much less likely to survive. I have one that is ordinary looking (tan) and grows in a ball and has been in my tank for a year and has grown some. I've just started tring to bring home a sponge from each snorkel trip in the Keys. The first one survived 12 weeks in the QT just fine, but it started to disappear when I moved it to the DT. After 3 months is almost gone. :angryfire:
According to Julian Sprung's book on inverts, some do well, others don't stand a chance, most appear to not be very hardy. Some have short life spans (months) and others live for years. Some like good flow, some don't. Some need light, some don't and some hate the light! Some aren't even reef safe and some are even toxic to fish (only a couple). The biggest problem as I see it, is that so many look so similar (even worse than corals) that it's hard to know what you really have. Good luck.