Epulonipiscium

Genus of giant Gram-positive bacteria that have a symbiotic relationship with surgeonfish

Candidatus Epulopiscium is a genus of Gram-positive bacteria that have a symbiotic relationship with surgeonfish. These bacteria are known for their unusually large size, many ranging from 0.2 - 0.7 mm in length. Until the discovery of Thiomargarita namibiensis in 1999, Epulonipiscium species were thought to be the largest bacteria. They are still the largest known heterotrophic bacteria.

This keyword could refer to multiple things. Here are some suggestions: