This species looks quite unusual. It has a big mouth, small eyes and nice, greenish spots on its body and orange fin rays. At first, L309 was thought to be a Baryancistrus species because of its untypical shape, which says a lot about its appearance. Only old, full-grown males develop the famous head tentacles, and it’s known to be a slow growing species.
Facts:
Name: Ancistrus sp.
Trade names: Bigmouth Bristlenose, L309
Origin: Rio Tapajos, Brazil
Maximum TL: 10 cm / 4”
L309 is a rare species in the hobby, as it’s not allowed for export from Brazil and among aquarists it’s mostly overlooked. It’s not very demanding though, if the water is clean and well filtered. It’s rather unproductive (about 20 eggs per clutch), but not difficult to breed in soft water. Its small size makes it perfect even for smaller aquariums.
More info:
http://www.l-welse.com/reviewpost/showproduct.php/product/324/cat/44
http://www.planetcatfish.com/common/species.php?species_id=1665