Can't find too much info on sponges?

[CBehr]

The several links/articles I've read seem to have varying views on keeping sponges. Some say exposing to air causes certain death, others say it's not a huge deal.

Any good reliable links I can read more about potentially keeping one of the below sponges?

http://www.reefs2go.com/category/sea_life.sponge/

 

[Elysia]

Here are two articles, although they contain a lot of background and little in the way of husbandry, perhaps you will be able to tell for yourself if you have what it takes to keep them?

http://www.reefkeeping.com/issues/2005-06/rs/index.php
http://www.reefkeeping.com/issues/2005-07/rs/index.php