Is that lime in the yellow mesh? That is normally what comes with a fish dish..
like this:

(this is a lemon I know, but that is the way they do citrus for fish is the point)

I say this because, if that is lime, it is possible they were indeed out of normal 'drink' quarters of lime, and the one FA went above and beyond for you by quatering one intended for the meal for your drink.

That looks like a pretty decent meal there, nice amount of veggies with the rice.