When I was in the Army, we were in Honduras on a deserted beach. Walking in the water waist deep every step you took was on top of a sand dollar. They were everywhere. Obviously they broke when stood on. Unfortunately we were not allowed to bring anything home.
When was that and where was the beach? Where were you stationed in Honduras? In the late 80’s I met a retired Lt. Col. who was a CO at a small base near El Salvador where they helped train the El Salvadorian military