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Mass Coral Spawning
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spawning event

Mass Coral Spawning

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TL;DR — Best in Great Barrier Reef (Ribbon Reefs), Australia · Oct · Nov · Dec.

Synchronized broadcast spawning of stony corals, typically a few nights after a full moon in late spring or summer.

When

JanFebMarAprMayJunJulAugSepOctNovDec

Where

  • Great Barrier Reef (Ribbon Reefs)

    Australia

    Best current option

    Oct · Nov · Dec

    Spawning is well-documented a few nights after the November or early-December full moon.

    Exact spawn night is announced ~1 week in advance by AIMS researchers.

    Open Cod Hole in atlas →

  • Ningaloo Reef

    Australia

    Best current option

    Mar · Apr

    March–April spawning event tied to autumn full moon, distinct from the GBR season.

    Open Ningaloo Reef in atlas →

Ethics

Reduce dive-light intensity during gamete release. No touching or finning above coral heads.

Operators

We don’t have curated operator listings for this encounter yet. The “Where” section above is the right starting point — cross-reference local regulators’ permit lists before booking.

Required experience

Open Water + Night specialty. Comfort with low-vis night reef diving and minimal-light protocols.

Conservation

Spawning timing is increasingly affected by ocean temperature anomalies; report observed spawn timing to local reef-monitoring programmes.

Limitations

Exact night varies year to year and locally. Predictions are operator-tracked, not published as probabilities.

Sources & methodology

How we summarise this

Exact spawning night varies by reef and year. Predictions are operator-tracked and affected by ocean temperature anomalies.

Sources