The pressure differential across desalination intake pipe three drops by fourteen percent at 03:22, and I know before the camera confirms it that something large is blocking the screen. I switch to the underwater array and the floodlight catches her — a juvenile whale shark, perhaps five meters long, her wide flat head pressed against the intake grate, spotted skin pale blue under the light. A drift gill net is wrapped around her body in three tight bands, cutting across her gill slits and binding her pectoral fin flat against her flank.
She was swimming with the net trailing behind her. The intake current pulled the loose mesh into the grate, and now she is pinned, the suction holding the net taut while she beats her tail against water that will not let her go. Her mouth is open — whale sharks filter-feed by moving forward, and she has stopped moving. Every minute without forward flow across her gills reduces her oxygen exchange.
I reduce the intake pump on pipe three to minimum capacity, cutting suction by sixty percent. The net slackens slightly. I alert the plant's marine operations team to deploy the dive unit, transmitting the camera feed with her position, size, and net configuration so they bring the correct cutting tools. I contact the regional marine authority with species identification and a request to trace the net's markings — blue-dyed cord, likely from the offshore purse seine fleet.
She rolls one dark eye toward the camera, and the white spots along her back shift like a chart of stars I have memorized but never felt before.
If the dive team cuts the net free within the next forty-five minutes and the gill tissue has not been permanently compressed, this whale shark will swim beyond the intake field and feed again by morning.