Aquatic organisms are natural data loggers and are constantly recording chemical variations within their accretionary tissues. Chemical sclerochronology is the study of these chemical variations through time and how they can be used to understand environmental change and the physiology and ecology of species. While sclerochronological research has largely focused on bivalves, teleost fish, and hard corals, there are many other aquatic taxa rich with time-resolved chemical data. To expand focus to these ‘other’ taxa and determine the state-of-play, we compiled a database of sclero-chemical studies that span nine living Phyla and 20 Classes. We then examined research trends and knowledge gaps across these taxa, as well as showcase their exciting potential to collect critical data and address pressing environmental challenges. We hope this synthesis will encourage researchers to investigate new taxa for sclero-chemical research, as well as foster collaboration and synergies among the established and lesser-known fields of sclerchronology.