Hello, I've been recording all the possible microorganisms in my biofloc system, but I found a filamentous species that I still can't figure out what it is. I observed that it branches, as shown in the images, and macroscopically, it resembles fine threads attached to the substrate or wall. My biofloc system uses freshwater with a salinity of 4 mg/L, using the species Mugil cephalus extracted from a wetland near the coast.