Imitation, counterfeit, or what?

[Joel S. Berson]

I want to refer to an animal being exhibited that is a hoax -- not
genuine, but unreal, constructed in some way.

"Counterfeit" has the useful association with "made", as does
"fabricated".  Imitation, fake, mock, concocted seem possible
too.  What words are most commonly used to describe such a construction?

Joel

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