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.