You need to culture and get both culture and microscopic morphology.

Most likely Rhizopus or Aspergillus. Please take pure culture and closed micrographs.

It looks like a fungus of the genus Aspergillus.

subculture in PDA then re-examine them under light microscope.

Please ignore Rhizopus or Aspergillus above. There is nothing in the pictures useful to those identifications.

I have been working in this field for more than 30 years. Please do a slide culture to maximize the spore/ conidia formation. Then it would be easier to identify them as Aspergillus and Rhizopus or other hyaline contaminant. If you can provide slide culture pig images, then I will do the species identification for you using morphological features as per my experience in isolation and identification of medically important fungi as well as environmental contaminants.