Retraction of: Scientific Reports https://doi.org/10.1038/s41598-020-60534-0, 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.