Yes.
We don't need marines. Our job isn't fight any deeper than the jettys and shores lines.
I actually trained for that what back when I was on my Naval LANDING Boarding Party course.
This is how Google defines it:
Littoral patrolling is the military or naval act of watching, guarding, and scouting shallow coastal waters, near-shore zones, and beaches where the land and sea meet. It aims to find threats, stop illegal movement, and secure areas close to the coast.