was never traded in large numbers and is one of L-numbers in great demand. We received now three large specimens from Brazil, which seem to be fully grown. They are 25-30 cm long. One of them is for sure a male. It can be easily identified by the strong spines and the long interopercularodontodes (the "whiskers"). The females are also very spiny - this is why the genus is called the cactus-catfish - and it seems that they have something in common with the dwarf females in Tolkien´s "Lord of the Rings
": they are often not recognized as females, because they have beards like men.