It was only when she looked up that she realized there was a kind of latch. She swam upward, her golden tailfin finally able to expand and stretch. She tried to push the latch open but it appeared to be locked. "Alohamora," she muttered, but it didn’t budge. There didn’t seem to be an actual lock, but it was sealed somehow. After a few minutes she gave up and sank back to the bottom.