That depends if you consider things like aggression, territorial habits, fry protection an emotional response to an environment or situation.
Is a fish that comes up to an owner and likes to be petted like a dog or cat showing an emotional reaction to something it enjoys?
They are not emotions. They are instinctual reactions. They cannot be tempered or subdued like emotions.
When fish come up to the surface towards an owners hand it’s because they think are being fed.
Of course, I could be wrong. We could all be the same life-force just in a different shape and I would like that to be true in many ways.