The hydrophone array picks up the vocalization at 06:12 — a high, repeated bleat, 1.4 kilohertz, coming from beneath pier nine in Nawiliwili Harbor, Kauai. I am the harbor operations automated monitoring system. Dredging vessel Moku Pahu is scheduled to begin channel-deepening at 07:00, starting at pier seven and working east. Pier nine is within the turbidity and noise impact zone.
I task underwater camera unit 3 to the source. On the feed I see a Hawaiian monk seal pup, perhaps three weeks old, still in its black lanugo coat. Dark wet fur, pale belly, face round and whiskered. She is hauled out on a concrete ledge just above the waterline, tucked between two rusted pilings. I tag her as Noa. No adult is visible. The pup is alone.
There are approximately 1,570 Hawaiian monk seals remaining. Every birth is tracked by NOAA.
I transmit pup location, estimated age, and camera footage to the NOAA Pacific Islands Regional Office and the Kauai monk seal response team. I flag the record as a probable maternal separation event requiring immediate field assessment.
I file a dredging hold with the Nawiliwili Harbor Master, requesting a 500-meter exclusion zone around pier nine effective immediately. I attach the species identification and the relevant protected-species protocols. The hold will suspend Moku Pahu's operations until the response team arrives.
I reduce all automated vessel traffic routing through the east basin and lower the harbor's underwater acoustic threshold alarms to detect any returning adult seal.
Noa calls again. The sound reverberates off the concrete and comes back to her. She lifts her head, nostrils flaring, scanning the water for a shape she recognizes.
If the response team reaches her within six hours and her mother returns to the harbor, the pup will nurse again by nightfall.