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the claim

Fish sleep.

the verdict
SUPPORTED
the evidence backs this
Recorded sources
8 sources for · 0 against

Counts group repeated records of the same source within each side. They do not measure evidence strength or source independence.

Is it true that fish sleep?

Yes. A peer-reviewed review and a NOAA explainer both indicate that fish exhibit behavioural sleep or rest, though fish sleep differs from mammalian sleep and some continuously swimming species show no sleep signs. A 1914 popular item also states that all fish sleep at regular intervals.

Verdict: SUPPORTED · 8 sources for, 0 against · Last checked

The private library was unavailable for some searches in this check. Missing library results are not evidence against the claim.

Evidence for · 8
Sleep in fish
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Sleep in fish. (n.d.). en.wikipedia.org. https://en.wikipedia.org/wiki/Sleep_in_fish

See more details
More for · 7
Do Fish Sleep?
2011
Get citation
Weis, J. S. (2011). Do Fish Sleep?. play.google.com. https://play.google.com/store/books/details?id=dEr76xsZ9g4C&source=gbs_api

Do fish sleep?dot gov iconhttps icon
Get citation
Do fish sleep?dot gov iconhttps icon. (n.d.). oceanservice.noaa.gov. https://oceanservice.noaa.gov/facts/fish-sleep.html

Sleep in a schooling fish, Tilapia mossambica
1976
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Sleep in a schooling fish, Tilapia mossambica. (1976). doi.org. https://doi.org/10.1016/0031-9384(76)90222-5

Encyclopedia of Fish Physiology
2011
Get citation
Encyclopedia of Fish Physiology. (2011). play.google.com. https://play.google.com/store/books/details?id=3bsgS125KH0C&source=gbs_api

FISH AND SLEEP. (Auckland Star, 02 August 1902)
1902
Get citation
FISH AND SLEEP. (Auckland Star, 02 August 1902). (1902). paperspast.natlib.govt.nz. https://paperspast.natlib.govt.nz/newspapers/AS19020802.2.85.21

The interplay between sleep and ecophysiology, behaviour and responses to environmental change in fish
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The interplay between sleep and ecophysiology, behaviour and responses to environmental change in fish. (n.d.). cir.nii.ac.jp. https://doi.org/10.1242/jeb.247138

HOW FISH SLEEP WITH BOTH EYES OPEN. (Rodney and Otamatea Times, Waitemata and Kaipara Gazette, 10 June 1914)
1914
Get citation
HOW FISH SLEEP WITH BOTH EYES OPEN. (Rodney and Otamatea Times, Waitemata and Kaipara Gazette, 10 June 1914). (1914). paperspast.natlib.govt.nz. https://paperspast.natlib.govt.nz/newspapers/ROTWKG19140610.2.57

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