Answer
Coastal stewardship messaging increasingly encourages mineral and environmentally considerate sunscreens to reduce chemical load in ocean and bay waters. Whatever you choose, apply enough protection and reapply after swimming. Pack out aerosol cans and trash so they never end up in the dune line.
Sources: Visit Ocean City · Maryland DNR · NOAA marine debris guidance
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.
