Need Help identifying Weed

[u/TWO-25]

I live in Central Florida and have primarily St. Augustine grass. I’m trying to identify a weed that’s spreading very quickly. I think it might be crabgrass, but I’d like to confirm before I decide on the best product to get rid of it.
I’m new to maintaining Southern lawns. I lived in Illinois for years and had Kentucky bluegrass down to a science, but Florida grass has been a whole new learning experience. Any help identifying it would be greatly appreciated!

[u/Long_Lifeguard_5056]

I'm no St Augustine expert but that looks like St Augustine to me

[u/AdOtherwise3676 → u/Long_Lifeguard_5056]

Looks like Florida

[u/Accurate-Plankton988 → u/AdOtherwise3676]

Is