Traditional Culture Encyclopedia - Photography major - Why is it called animal black fungus?

Why is it called animal black fungus?

This is a screen name given to Zhai Ling by her boyfriend "No screwdriver": "Beast of golden eye". Zhai Ling is very satisfied with this screen name and thinks it is cute. The boyfriend of the beast is a professional photographer, and many beautiful moments of the beast are captured with his lens without a screwdriver.