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Whales are mammals.

the verdict
SUPPORTED
the evidence backs this
Recorded sources
12 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 whales are mammals?

Yes. Multiple reference works and an official fisheries source state directly that whales are mammals, and several other sources treat whales as marine mammals.

Verdict: SUPPORTED · 12 sources for, 0 against · Last checked

Evidence for · 12
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Wikipedia: List of mammals of the Marshall Islands. (n.d.). en.wikipedia.org. https://en.wikipedia.org/wiki/List_of_mammals_of_the_Marshall_Islands

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More for · 11
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Wikipedia: List of marine mammals of Australia. (n.d.). en.wikipedia.org. https://en.wikipedia.org/wiki/List_of_marine_mammals_of_Australia

1963
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Z, P. E. (1963). The book of whales and other sea mammals. archive.org. https://archive.org/details/bookofwhalesothe00pose

1992
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Henry, D. (1992). Whales: Incredible Ocean Mammals.. eric.ed.gov. https://eric.ed.gov/?id=EJ463233

1963
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Z, P. E. (1963). The true book of whales and other sea mammals. archive.org. https://archive.org/details/truebookofwhales00pose

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Whales | NOAA FisheriesLock. (n.d.). fisheries.noaa.gov. https://www.fisheries.noaa.gov/whales

2005
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SA, P., OR, B., & JL, G. (2005). A complete phylogeny of the whales, dolphins and even-toed hoofed mammals (Cetartiodactyla).. doi.org. https://doi.org/10.1017/s1464793105006743

1972
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Podendorf, I. (1972). I Want to Know About... Health, Plant Experiments, Whales Volume 16. archive.org. https://archive.org/details/iwanttoknowabout0000illa_k1c9

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A review of Killer Whale interactions with other marine mammals: predation to co‐existence. (n.d.). cir.nii.ac.jp. https://doi.org/10.1111/j.1365-2907.1991.tb00291.x

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Killer Whale ( Orcinus orca ) Predation on Beaked Whales ( Mesoplodon spp.) in the Bremer Sub-Basin, Western Australia. (n.d.). doi.org. https://doi.org/10.1371/journal.pone.0166670

2025
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NS, T., A, H., S, I., & BK, D. (2025). Brucellosis in Marine Mammals: Meta-Analysis of Prevalence, Infection Patterns, Host Specificity and Zoonotic Potential.. doi.org. https://doi.org/10.1002/vms3.70557

2026
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S, G., G, G., LF, L., INL, P., FDS, V., A, N., EP, R., & M, M. (2026). Assessing oceans' health through biopsy sampling in free-ranging marine mammals: a systematic review (2014-2024).. doi.org. https://doi.org/10.1007/s11356-026-38163-3

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