ETYM From Run.
1. Someone who travels on foot by running.
2. A trained athlete who competes in foot races.
3. The rails or glides on which something can move along, usually over snow or ice.
4. A person who is employed to deliver messages or documents.

Or stolon; In botany, aerial stem that produces new plants.

Fish of western Atlantic: Cape Cod to Brazil; SYN. blue runner, Caranx crysos.