WE SWAM. I kept my wings tightly folded against my back. I’m not a bad swimmer, but the Aquatics had obviously been designed for this: Though clumsy and awkward on land, in the water they became graceful, fluid, powerful swimmers.

The ocean, which only three months ago had been crystalline, a clear, clean aqua, was now a murky, opaque sludge with almost zero visibility. I followed Jonny mostly by the swirling eddies of ash particles, while trying to keep an eye on Nudge. The stupid oxygen tank made it hard to swim, weighing me down, and I considered just ditching it.

“Aiiieeeeee!!!!”

The panicked scream was garbled and muffled, but unmistakable. My head whipped around but I saw nothing but churned-up sludge. More screams echoed through the water around me, and I glimpsed a couple of the Aquatics speeding past me with terrified expressions. What’s happening? Where is Nudge?

Was it a… party? The murky water seemed alive with streamers whipping and writhing in the currents. Could this be some sort of welcoming ceremony? Someone had been surprised and had screamed?

Oh, God, oh, God. My brain had no time to think except to register: These streamers are alive.

They were eels or water snakes, and they were freakishly large. Slick ropes of muscle fifteen feet long and as thick as my waist, they made looping Ss through the water, disappearing and reappearing confusingly so that I lost all sense of direction.

But the most horrible part was their mouths. Their whole heads, really, were circular vacuums of death, with rows and rows of teeth spiraling inward toward a gaping hole. The kind of thing you don’t want to see on a movie screen, let alone near your leg.

Uh-huh. My leg.

There it was, slimy and quick, with its razor-sharp teeth moving closer and closer to my flesh. Once it attached, I felt a powerful leechy sucking sensation and then the first jolt of pain. I kicked at it, but my splashing just seemed to attract more of them, and I could only hold them off so much longer.

Desperate, I did the only thing I could think of: I slipped off the straps of the oxygen tank and quickly turned its valve. Immediately, pressurized bubbles burst out of it with the power of a fire hose, sending the eels wheeling away from me. I grinned victoriously but then blanched when I realized why the eels weren’t returning.

A flash of color in the olive-green water caught my eye. It was striped, like Jonny Diamond’s shirt. They’d found a new target: Jonny. I kicked with my legs, aiming my tank, but stopped in horror as I took in the scene:

One had suctioned onto him, and the snakelike body streamed out from his chest. For a second it just seemed like a small inconvenience, an odd extra limb, and Jonny tugged at the tail determinedly.

For a second.