"That's the problem," Lenie buzzes. She looks back at Fischer and Caraco. "Mud plume. Too big to redirect."

They've come past eight generators so far. That leaves six up ahead, drowning in silt. Double shift, even if they call out Lubin and Brander.

He hopes they don't have to. Not Brander, anyway.

Lenie fins off towards the plume. The squids whine softly behind, dragging their tools. Fischer steels himself to follow.

"Shouldn't we check thermal?" Caraco calls out. "I mean, what if it's hot?"

He was wondering that himself, actually. He's been wondering about such things ever since he overheard Caraco and Nakata comparing rumors from the Mendocino fracture. Nakata heard it was a really old minisub, with Plexiglas ports. Caraco heard they were thermoacrylate. Nakata said it got wedged inside the center of the rift zone. Caraco said no, it was just cruising over the seabed and a smoker blew up under it.

They agreed on how fast the viewports melted, though. Even the skeletons went to ash. Which didn't make much difference anyway, since every bone in every body had already been smashed by the ambient pressure.

Caraco makes a lot of sense, in Fischer's opinion, but Lenie Clarke doesn't even answer. She just fins off into that black sparkly cloud and disappears. At the spot she disappears the mud glows suddenly, a phosphorescent wake. The fish swarm towards it.

"She doesn't even care, sometimes," Fischer buzzes softly. "Like, whether she lives or dies..."

Caraco looks at him for a moment, then kicks off towards the plume.

Clarke's voice buzzes out of the cloud. "Not much time."

Caraco dives into the roiling wall with a splash of light. A knot of fish— a couple of them are a fair size now, Fischer sees— swirl in her wake.

Go on, Shadow says.

Something moves.

He spins around. For a moment there's only Main Street, fading in distance.

Then something big and black and...and lopsided appears from behind one of the generators.

"Jeez." Fischer's legs move of their own volition. "They're coming!" he tries to yell. The vocoder scales it down to a croak.

Stupid. Stupid. They warned us, the sparkles bring in the little fish and the little fish bring in the big fish and if we don't watch it we just get in the way.

The plume is right in front of him now, a wall of sediment, a river on the bottom of the ocean. He dives in. Something nips lightly at his calf.

Everything goes black, with occasional sparkles. He turns his headlight on; the flowing mud swallows the beam half a meter from his face.

But Clarke can see it, somehow: "Turn it off."

"I can't see—"

"Good. Maybe they won't either."

He kills the light. In the darkness he gropes the gas billy from its sheath on his leg.

Caraco, from a distance: "I thought they were blind..."

"Some of them."

And they've got other senses to fall back on. Fischer runs through the list: smell, sound, pressure waves, bioelectric fields... Nothing relies on vision down here. It's just one of the options.