Answer
Freshwater can trigger remaining stinging cells on some species. Use saltwater rinse first, then seek lifeguard care. Condo shower later is fine after initial treatment—just not as the first rinse on the beach.
Sources: Ocean City Beach Patrol · Atlantic General Hospital
Editorial visitor guidance for Ocean City, Maryland. Confirm current Town of Ocean City, Maryland DNR, NPS Assateague, and NWS rules when regulations or safety apply.
