**5. Conclusions**

The results of this study show that the addition of 2.5% marine algae to the diet of fattening lambs with competent RGR, either mixed in the concentrate or bottle-fed, does not have any negative effect on growth performance, carcass characteristics, meat quality, or, for the most part, oxidative stability. This "from farm to fork" strategy, intended to increase the levels of omega-3 polyunsaturated FA in meat, would be of grea<sup>t</sup> interest to the improvement of lamb meat from a nutritional point of view, without affecting animal performance or other meat quality parameters.

**Author Contributions:** Conceptualization, F.P.B. and A.L.M.M.; methodology, F.P.B., M.V.A., C.A.R. and A.H.I.; formal analysis, A.L.M.M.; investigation, N.N.-S., F.P.B. and A.L.M.M.; resources, A.L.M.M., F.P.B., M.V.A. and A.H.I.; data curation, F.P.B. and C.A.R.; writing—original draft preparation, N.N.-S., F.P.B. and C.A.R.; writing—review and editing, A.L.M.M., P.G.-C. and N.N.-S.; visualization, P.G.-C.; supervision, A.L.M.M., P.G.-C. and M. Á.d.l.F.; project administration, M. Á.d.l.F.; funding acquisition, M. Á.d.l.F. All authors have read and agreed to the published version of the manuscript.

**Funding:** This research was funded by the Spanish Ministry of Science and Innovation, project number AGL2016-75159-C2-2-R and the Spanish National Research Council, gran<sup>t</sup> number 20217AT002.

**Institutional Review Board Statement:** The study was approved by the Ethics Committee of Universidad de Córdoba and the competent authorities (protocol code 04/05/2018/074 and date 5 May 2018).

**Informed Consent Statement:** Not applicable.

**Data Availability Statement:** The data presented in this study are available in the article.

**Acknowledgments:** P.G.-C. gratefully acknowledges the Ramón y Cajal research contract (RYC2019- 027933-I) funded by the Spanish Ministry of Science and Innovation.

**Conflicts of Interest:** The authors declare no conflict of interest. The funders had no role in the design of the study; in the collection, analyses, or interpretation of data; in the writing of the manuscript, or in the decision to publish the results.
