Circular Rope: Unity among Municipality's constituents.
Twenty Six Stars: Twenty - six (26) Barangays comprising Municipality.
Shield: From the Provincial Seal of Camarines Norte where the town is located.
Anchor, Sea & Fishes: Mercedes is a fishing village.
Riceland & Coconut Tree: Main products of Municipality.
Lighthouse: Parola situated at Canimog Island that guides fishermen when returning home at night and during typhoons.
1948: Year when Municipality was created by virtue of Republic Act No. 431.