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Retraction Note: Novel life history strategy in a deep sea fish challenges assumptions about reproduction in extreme environments

The Original Article was published on 27 February 2020

Retraction of: Scientific Reports, published online 27 February 2020.

The authors have retracted this Article. It has been brought to the Authors' attention1 that the eggs found in the buccal cavity of the examined specimen may actually be those of a species of crab. Re-analysis of the original samples confirmed this to be the case. While the breeding ecology of Parazen pacificus remains unknown and the species appears to be exapted for mouthbrooding, we find that the original data is not sufficient to confirm that this species is a mouth brooder.

All authors agree with the retraction.


  1. 1.

    Britz, R., Johnson, G. D. & Conway, K. Zeiform mouthbrooding in the deepsea–dispelling a myth. Preprint at (2020).

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Correspondence to Randal A. Singer.

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Open Access This article is licensed under a Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons licence, and indicate if changes were made. The images or other third party material in this article are included in the article's Creative Commons licence, unless indicated otherwise in a credit line to the material. If material is not included in the article's Creative Commons licence and your intended use is not permitted by statutory regulation or exceeds the permitted use, you will need to obtain permission directly from the copyright holder. To view a copy of this licence, visit

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Singer, R.A., Moore, J.A. & Stanley, E.L. Retraction Note: Novel life history strategy in a deep sea fish challenges assumptions about reproduction in extreme environments. Sci Rep 10, 19041 (2020).

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