Catriona is a genus of sea slugs, aeolid nudibranchs, marine gastropod molluscs in the family Trinchesiidae.

[1] All species were transferred to Tenellia as a result of a DNA phylogeny study in 2016.

[2] It was reinstated in 2017 on the basis of DNA and morphological criteria.

[3] Species within the genus Catriona include:[4] Species names currently considered to be synonyms: