My adult breeding group, roughly 4 years old, roughly equally split between males/females. They seem to spawn in the spring/fall, but I haven't taken great notes to know how consistent the timing was. 

I believe currently lucipinnis is considered to be the same species as the petricola, although I think this has gone back and forth a bit over the years. Lucipinnis has been previously referred to as a "dwarf petricola" and reach about 3.5" in length. These guys are always active and always hungry. They're peacful but will eat anything they can fit in their mouths, including their siblings. These guys do best in 78-80F hard water.