Never leave Sayori and Sephiroth in an aquarium enclosure. It doesn’t matter how big the enclosure is, just don’t do it. Here’s why:
-The creatures in that same enclosure will swim away from Sayori and Sephiroth, causing a major inconvenience for aquarium visitors
-Kids who are visiting the aquarium with their parents will be traumatized
-If any of the creatures provoked Sayori and Sephiroth, the latter group’s destructive impulses will shatter the glass, which will result in deaths and injuries, as well as the aquarium having to be temporarily shut down so that the mess could be cleaned up and it could be rebuilt
-Why are Sayori and Sephiroth in an enclosure anyway?
