Reflectin is a protein originating from the Hawaiian bobtail squid, Euprymna scolopes, which is native to the central Pacific Ocean. Reflectins, a recently identified protein family that is enriched in aromatic and sulphur-containing amino acids, are used by certain cephalopods to manage and manipulate incident light in their environment. It is possible that reflectins are beta barrel type proteins.
References
Reflectin Wikipedia(Text) CC BY-SA