Is the word gorilla capitalized in mid sentence?

No, the word "gorilla" is not capitalized in mid-sentence, unless it's part of a proper noun.

Here are some examples:

* Correct: The gorilla was eating bananas.

* Correct: The San Diego Zoo has a famous gorilla exhibit. (Here, "gorilla" is part of the proper noun "San Diego Zoo")

* Incorrect: The Gorilla was eating bananas.