wow, never seen one that big (maybe its the pix). Those look like eggs on the side.
These guys are deadly and a pain to remove. check the undersides of all your montis for eggs. dips don't kill the eggs - you have to get a soft toothbrush and scrap them all off.
I set up a quarantine tank and waited to starve them out. I just recently spotted a few - so its all over again.
they killed 2 of the less common monti colonies that I had.