Study
The winnowing: establishing the squid–Vibrio symbiosis
Nyholm, Spencer V.; McFall-Ngai, Margaret J.
Nature Reviews Microbiology, 2004
Reviews how the Hawaiian bobtail squid acquires its luminous bacteria from seawater within hours of hatching, and the sequence of physical and chemical filtering by which one bacterial species is selected from among thousands present.
- Studied in
- Euprymna scolopes, Aliivibrio fischeri
- Sample size
- review of the bobtail squid light-organ symbiosis
The squid hatches without its symbiont and recruits Aliivibrio fischeri from the surrounding seawater. A series of filtering steps — mucus secretion, ciliary currents, chemical selection and a narrow duct — progressively excludes other bacteria, and the light organ then develops only in colonised animals.
What it means
The authors' reading, and ours. Where they differ, that difference is the point.
How the authors put it
The partnership is re-established every generation from the environment, through a selection process precise enough to admit essentially one species.
How NatureHQ reads it
The record that reframes what a light organ is. The squid did not evolve a way to make light; it evolved a container, a recruitment procedure and a filter. The animal supplies the housing and the bacteria supply the chemistry, and the deal is renegotiated at every hatching.
- A review of one exceptionally well-studied symbiosis, which is a model system precisely because it is tractable.
- How representative it is of other bacterial light organs, including those of anglerfishes, is only partly established.
Choosing one bacterium out of thousands
A bobtail squid hatches without its luminous bacteria and has them within hours. How does it select one species from everything in seawater?
What this study is used for on NatureHQ
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Published by: Nature PortfolioPublished in a Nature Portfolio journal.
Checked against Crossref on 2026-09-28, and they agree on the title, the authors and the year.
NatureHQ summarises research in its own words and does not reproduce published text. Reviewed 2026-09-03.