' Megaira' are diverse symbionts of algae and ciliates with the potential for defensive symbiosis.

Symbiotic microbes from the genus Megaira' () are known to be common associates of algae and ciliates. However, genomic resources for these bacteria are scarce, limiting our understanding of their diversity and biology. We therefore utilize Sequence Read Archive and metagenomic assemblies to explore the diversity of this genus.