The keys are indiciative of St Peter.
The lion is there coat of arms. Like the eagle is are coat of arms.
Snails represent deliberation and perseverance on Coat of Arms
They do not represent anything in themselves as such. The coat of arms features three castles on fire. It is meant to represent the resilience of Dublin to whatever difficulties it has to face.
The coat of arms represents the five regions of Croatia on it's flag.
The Spanish Coat of Arms
The ship on the Bahamian Coat of arms is reputed to represent the Santa Maria, flagship of the small fleet that took Columbus to the "New World in 1492.
It repersents Canada
The fishing industry is represented by the fish in the Barbados's coat of arms.
Germany's coat of arms shows a black eagle on a yellow background. Since 1990, it has been symbolic of a reunified Germany.