In fact, rare articles are found on this topic. But you will find in text books such as Fish disease by Noga and Fish disease by Roberts.

Interesting is the following article that show Bacillus subtilis, an established probiotic in fish, has anti fungal activity against aspergillus

https://sfamjournals.onlinelibrary.wiley.com/doi/full/10.1046/j.1365-2672.2001.01290.x

You can read the fish disease related books and also search in researchgate. There are many available about to related not direct.

Thank you Seyyed Morteza Hoseini Md. Hamidur Rahman J. L. Champika Sajeewa Perera

This may help you https://www.nature.com/articles/s41598-019-49284-w#Sec9