Microbiome composition of the marine sponge Cliona varians at the neotropical southern Caribbean Sea displays a predominant core of Rhizobiales and Nitrosopumilaceae.

Coral reefs bioresources such as sponge holobionts are intriguing and complex ecosystem units. This study contributes to the knowledge of how C. varians microbiota is composed or shaped, which is crucial to understand its ecological functions.