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Here, we serendipitously discovered that octopus ribosomes contain a structural break in the core ribosomal RNA that is unique among all animals. This break site enhances translation fidelity to reduce miscoding and subsequent protein aggregation, even when engineered into evolutionarily distant bacterial ribosomes. Furthermore, high fidelity translation by octopus ribosomes supports proteomic stability during extensive RNA editing observed in cephalopods, suggesting synergy between distinct non-canonical modes of gene regulation. This adaptation emerged in recently derived octopuses with expanded nervous systems, thereby revealing a mechanism that could broadly support the evolution of novel organismal traits.<\/jats:p>","DOI":"10.64898\/2026.06.25.734654","type":"posted-content","created":{"date-parts":[[2026,6,26]],"date-time":"2026-06-26T14:25:17Z","timestamp":1782483917000},"source":"Crossref","is-referenced-by-count":0,"title":["Evolution of a core ribosomal innovation in octopus"],"prefix":"10.64898","author":[{"ORCID":"https:\/\/orcid.org\/0000-0001-6840-6160","authenticated-orcid":false,"given":"Rishav","family":"Mitra","sequence":"first","affiliation":[{"name":"Department of Molecular and Cellular Biology, Harvard University, Cambridge, MA, 02138, USA"},{"name":"Department of Cancer Immunology and Virology, Dana-Farber Cancer Institute, Boston, MA, 02115, USA"},{"name":"Department of Cell Biology, Harvard Medical School, Boston, MA 02115, 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