Reticulated Butterflyfishes are among the easiest fish to identify with their array of white spots on black, and other notable markings.

The same cannot be said for Brown Surgeonfishes. Mostly brown, with a tinge of lavender and some dull spots on the face, this is a fish that’s often overlooked. But according to my fish book, it boasts a couple of noteworthy accolades.

The first is that, back in 1993, “the biggest species of bacteria known to science had been discovered in the gut of this surgeonfish.” It notes that the bacteria was about the size of a hyphen in a newspaper article, which is a pretty good size actually.

The other distinction is that a study, by Roland and Marie-Louise Bauchot, of the brains of Hawaiian reef fishes, declared that the smartest fish on the reef is none other than the little Brown Surgeonfish.