Orange pauldron indicates that that this stormtrooper is a commander. I believe that this is the highest pauldron rank. They appear in star wars rebels only however a sandtrooper wears a orange pauldron in a New hope and the upcoming Rogue one. Stormtrooper sergeant
Estuaries are also in the littoral zone. The littoral zone is the part of a sea, lake or river that is close to the shore. In coastal environments the littoral zone extends from the high water mark, which is rarely inundated, to shoreline areas that are permanently submerged.
On cliffed coasts with steep slopes the nearshore zone will be narrow and waves may break right on the cliff or at the shoreline at the cliff toe, and there will be considerable reflection of wave energy-the surf zone will be absent and the breaker zone will be very narrow.