Yeah but I feel like making a tank large enough for a 130ft long string of goo is easier than finding a way to keep it a 130ft string of goo.
You do realize the open ocean panes are only 90 feet long right? So 40 feet shorter than potential length of Praya dubia? Also if they're exhibiting Bloody-belly comb jellies and mauve stingers I think they've got keeping deepwater goo down.