F-1 juvenile fish imported from Europe. Approximately 1.25+". Calvus from Lupota can be a very dark fish, and is considered the original location for the inkfin clavus. It should be noted that "inkfin" is a marketing term and not all fish will be super dark. Pictured is a group of wild fish from Lupota that were imported by us. The pic shows the varying shades of darkness occuring in this collection locale. It is impossible to tell how dark a given juvenile fish will be as an adult.