I found an article in which dried oyster mushrooms are described as an additive in catfish feed, with a beneficial effect on their immuno system..So whenever we produce too many mushrooms, we know what to do with them
http://rizarahman.staff.umm.ac./2012/07/02/supplemental-nang-fa-mushroom-pleurotus-sp-in-pangasius-catfish-pangasius-hypophthalmus-diets-effect-on-immunity-and-fillet-quality/