People in Ottawa enjoy eating beaver tails. They just look like beavers' tales.

-----------------------
What is the meaning of 'just' here? Does just mean 'exactly' or 'merely'?

I looked up the word 'just' in the dictionary. It means 'simply.' It means 'really or completely' as well. How do we distinguish the use of 'just'?

In this sense, "just" means exactly or really.

In this context, the word "just" is used to mean "exactly." It is saying that beaver tails look exactly like beavers' tails. The sentence is emphasizing that there is a strong resemblance between the food called "beaver tails" and the tails of real beavers. The use of "just" here is not conveying a sense of limitation or triviality, but rather emphasizing the accuracy of the comparison.