On the previous issue, it was revealed that Dead Water is the defense mechanism of Tethys, a sentient living water from another dimension. If a person gets too close to the interdimensional portal while having strong feelings of fear, it automatically transform that person into Dead Water.
Pretty good ending here in the sense that Aquaman saved innocents but at the cost of harming a sentient being from another dimension that he just met. That means I wouldn’t be surprised if Tethys comes back sometime down the line and becomes an enemy of Aquaman because of this.
Isn’t it remarkable that the writers are delving into the difficult choices that Aquaman has to make as king of Atlantis? Not all problems have a win-win solution like this one.
From – Aquaman Vol. 8 #22