This is a not-so important PSA from someone who sometimes edits pages including galleries.
Sentence fragments, which are especially seen in image captions, do not end in a period.
In the above examples, the left caption is correct. The right one ends in a period while it shouldn't, even though it's seen in many pages throughout the wiki. This is a small quirk but an ocean is made of single drops.
That is all. Thank you.