What would Starfleet special forces look like?

So in starfleet the everyday officers and crews on starships are like the backbone of the fleet

Then you got officers and crews on starbases this would be like your shore duty people.

Then we got a glimpse of Starfleet marines in ds9 during the dominion wars. Before that in enterprise we got to see macos which were like the army/marines

Section 31 would be like the CIA.

So it got me wondering if the starfleet is like the navy than they have to have their version of seals or special forces.

What do you think Starfleet special forces would look like or what do you think they would be doing?