The sea waters were getting colder. The temperature dropped by two more degrees already, in Celsius measurements.
Their surroundings have gotten colder that quickly, because the Aqus Goblins had initiated an attack against the Luminous Terror Jellyfish, triggering it to intensify its abilities! It was truly a beast of legends, and the thing was that the jellyfish was also cautious enough to avoid over-using its powers, because it did not want to risk having to float over the thick layer of ice that it could create.