One of the nicest species of Ancistrus is L107. It’s pitch black with relatively large (usually) white spots all over, and a large, forkshaped caudal fin. It’s not allowed for export from Brazil at the moment, so captive breeding is essential for the species’ presence in the hobby. It can grow to almost 20 cm, but this rarely happens in captivity.
Facts:
Name: Ancistrus sp.
Trade names: Brilliant Bristlenose, L107, L184, LDA3
Origin: Rio Negro, Rio Demini, Brazil
Maximum TL: 20 cm / 8”
A rather rare L-number! It’s a blackwater species, so breeding is only successful in soft, acidic water. This limits the production of the species among aquarists. However, it’s a very productive fish under the right circumstances. It needs clean, well oxygenated water, and lots of hiding places among roots and rocks. It’s not very interested in eating vegetables and green food, possibly because algae and vegetation are not very abundant in the dark waters of its natural habitat. Still, a varied diet is important.
More info:
http://www.l-welse.com/reviewpost/showproduct.php/product/119/cat/all
http://www.planetcatfish.com/common/species.php?species_id=751
https://www.aquariumglaser.de/en/10-catfishes/ancistrus-sp-l184-l107-2
https://www.scotcat.com/loricariidae/ancistrus_sp_l107_8.htm