Why is there a fish on the McCann crest?

There isn't any widely recognized "McCann crest" with a fish on it. The McCann family name is common in many parts of the world, and there are likely many family crests associated with it.

Here are some possibilities why you might have seen a fish on a crest associated with the McCann family:

* Heraldic Symbolism: The fish is a common heraldic symbol with multiple meanings. It could represent:

* Christianity: The fish is a symbol of Christ and early Christians.

* Abundance: Fish represent abundance, prosperity, and livelihood, especially for families involved in fishing.

* Water: It can symbolize water, rivers, or seas, which might be relevant to a family's history or location.

* Specific Branch of the Family: The fish on a crest may be specific to a particular branch of the McCann family. This branch might have adopted the fish as their unique heraldic symbol.

* Misattribution: You may be mistaking a different family's crest for a McCann crest. There are many families with crests that feature fish.

To determine the origin and meaning of a specific fish on a McCann crest, you would need more information:

* The exact image of the crest: A detailed picture of the crest would be crucial.

* The specific McCann family branch: Knowing the origin and location of the family would help narrow down possibilities.

If you can provide these details, we can explore the specific context and meaning of the fish on that particular crest.