6 cm specimen
Adult male in Rio Formoso, Mato Grosso do Sul
Head of male in Rio Formoso
2-3 cm specimen
Female in stress colors
Rio Formoso in Mato Grosso do Sul, Brazil
Rio formoso, cave red from high iron levels
Semiadult in light from a sunset
Male in cave
Juvenile in stress coloration
semi adult in stress colors
view of belly after capture (female)
Dorsal view after capture (female)
Head after capture (female)
|Cat-eLog Data Sheet|
|Scientific Name||Ancistrus sp. `RIO FORMOSO II`|
|Common Names||Formoso Mainriver Bristlenose
Formoso Hovedflods-antennemalle (Denmark)
|Pronunciation||an SISS truss|
|Etymology||The name Ancistrus is derived from the Greek word agkistron, meaning hook, in reference to the interopercular odontodes that are hooked.|
|Identification||Mature males and sometimes females have soft tentacles (bushy fleshy growths) on the snout - this is unique to the genus Ancistrus.|
|Sexing||Males develop soft tentacles on the head and while sometimes females also do, it is never to the grand extent of those found on that of the conspecific male.|
La Plata, Paraná, Paraguay, Upper Paraguay, Formoso (click on these areas to find other species found there)
Log in to view data on a map.
|Feeding||Ancistrus should be fed mainly on vegetarian foods. Prepared foods include algae wafers and spirulina based sinking food. Vegetables such as courgette/zucchini, and (English) cucumber are an excellent addition to the diet, along with the odd, small amount of more meaty foods.|
|Compatibility||A good complement to most aquariums, they are not aggressive to other species. Males may fight over territory if kept in too small a tank.|
|Suggested Tankmates||Appropriate with most community fish that aren't overly big or aggressive.|
|Breeding||All Ancistrus species are cave-breeders, where the male looks after the eggs and young fry.|
|Breeding Reports||There is no breeding report.|
|Registered Keepers||Keeping this species? Why not .
There is but a single registered keeper, view all "my cats" data.
|Wishlists||Love this species? Click the heart to add it to your wish list.
There is no wish to keep this species.
|Spotters||Spotted this species somewhere? Click the binoculars!
There are 2 records of this fish being seen, view them all.
|More on Ancistrus sp. `RIO FORMOSO II`|
|Look up Ancistrus sp. `RIO FORMOSO II` on AquaticRepublic.com|
|Get or print a QR code for this species profile, or try our LFS label creator.|
|Last Update||2019 Nov 21 10:42 (species record created: 2019 Nov 05 14:29)|