Mesophotic reefs
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Mesophoticreefs

40–150 mWestern shelf · stations M1–M718–23 °C

Zone 01 · Overview

Below the reach of recreational diving, mesophotic reefs live on the last one percent of surface light. Our teams survey them with rebreathers and low-lux photogrammetry, mapping colony growth across a decade so we can tell recovery from a good season.

Low-light coral communities that shelter species long thought lost from shallow water.

Associated species

Recovering

Plate coral

Leptoseris hawaiiensis

Flattens its skeleton to catch scattered blue light.

Stable

Twilight anthias

Pseudanthias ventralis

Shoals hang above ledges at 90 m, feeding on drifting plankton.

Watch

Black coral

Antipathes griggi

Slow-growing colonies, some older than the institute itself.

Network updates

12 AugNode M3Photogrammetry pass complete — 4 % new plate cover since spring.
02 AugNode M5Temperature logger swapped; sensor drift corrected in archive.
21 JulNode M1Bleaching alert cleared after nine days of cooler upwelling.

Continue the descent