Favites dropping polyps?

gogo7

pico reefer
hello folk,
i've noticed a new polyp show up over night almost, and i think its from my favites. a few inches away. i have hydnophora growing above it, of which i know that it dropped babies . but this doesn't look like the hydno.. i haven't fragged the favites before, it's growing on the glass and i don't wanna destroy it.
anybody see theirs drop babies?
my display is a four gallon. filterless, air driven, dsb plankton tank.
RPhP4H7.jpg

it's above the bubble algae
 
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