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Tropical larval and juvenile fish critical swimming speed (U-crit) and morphology data

Fisher, R, Leis, JM ORCID: 0000-0003-0603-3447, Hogan, JD, Bellwood, DR, Wilson, SK and Job, SD 2022 , 'Tropical larval and juvenile fish critical swimming speed (U-crit) and morphology data' , Scientific Data, vol. 9 , pp. 1-16 , doi:

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Fish swimming capacity is a key life history trait critical to many aspects of their ecology. U-crit (critical) swimming speeds provide a robust, repeatable relative measure of swimming speed that can serve as a useful surrogate for other measures of swimming performance. Here we collate and make available one the most comprehensive datasets on U-crit swimming abilities of tropical marine fish larvae and pelagic juveniles, most of which are reef associated as adults. The dataset includes U-crit speed measurements for settlement stage fishes across a large range of species and families obtained mostly from field specimens collected in light traps and crest nets; and the development of swimming abilities throughout ontogeny for a range of species using reared larvae. In nearly all instances, the size of the individual was available, and in many cases, data include other morphological measurements (e.g. “propulsive area”) useful for predicting swimming capacity. We hope these data prove useful for further studies of larval swimming performance and other broader syntheses.

Item Type: Article
Authors/Creators:Fisher, R and Leis, JM and Hogan, JD and Bellwood, DR and Wilson, SK and Job, SD
Keywords: larval-fish behaviour, dispersal, population connectivity, fisheries
Journal or Publication Title: Scientific Data
Publisher: Nature Publishing Group
ISSN: 2052-4463
DOI / ID Number:
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© Crown 2022. This article is licensed under a Creative Commons Attribution 4.0 International (CC BY 4.0) 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 license, and indicate if changes were made. The images or other third party material in this article are included in the article’s Creative Commons license, unless indicated otherwise in a credit line to the material. If material is not included in the article’s Creative Commons license 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 license, visit

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