Fungus on my Bulb. Medusa?
 

These yellow and black spot appeared rather quickly. When I first received the plant last week it had some black spots but I didn't want to worry. I kept it away from my other plants and yesterday I found the leaf like this.

I just want to confirm. I think it maybe a type of fungus? Should I cut it off , just soak it Physan?

Thank you

It seems bacterial.
A good source of info (look for Bacterial Brown Spot - Acidovorax)

Thank You!

How are you caring for it? Temperatures? Humidity? Light? How are you watering?

I just received it last week so I've had it in it's own little home for quarantine. Humidity is around 50% + usually. I hadn't watered it yet as it was still moist ( If I remember correctly ) and lighting is pretty strong but I thought the bulbs like stronger light.
Oh and it's pretty warm unfortunately. There is one fan that blows into the tent .