This catch dataset comprises specimen-based occurrence records collected by the Western Australian Museum from the Indian Ocean during a series of marine research voyages. Specimens were obtained aboard the RV Investigator during voyages IN2021_V04 and IN2022_V08 (Biodiversity Assessment of Australia’s Indian Ocean Territories) and IN2022_V09 (Valuing Australia’s New Gascoyne Marine Park), and aboard the RV Falkor during voyage FK200308 (Illuminating Biodiversity of the Ningaloo Canyons) in 2020. The dataset includes taxonomic identifications and associated collection metadata such as date, geographic location, and voyage information.