The Mermaid seemingly knew what she would find in here; were they her children? Or somebody else? It didn't matter; all that did was getting them out. Yet smashing the tank's material in anything less than hours would be too optimistic.
Split-second thinking had me considering Dauntless as a suitable destination, but the last thing we'd need was the water from inside the tank flooding engineering below. The ship had enough problems already without adding faulty power to the list. Portal.
The rift opened slightly above the tank and remained only long enough for its energy to take a substantial chunk off the top. As the prison suddenly became an open-topped aquarium, skittish creatures hugged the bottom, whether out of instinct or luck.
