What are those "beans"?

[Gajowa]

This is what freind of mine found in the poo of his discus.

http://pkmd.pl/pl/forum/viewtopic.php?f=18&t=5823&sid=da72e3fd4d9dd3d6c458f16c39632295

Last photo is in mag 400x.
Are those "beans" some kind of parasite?
None of them was mooving.

[Jennie]

what does she feed? Is her fish sick?