Mango Pleco

Geographic Origin and Biotope: Endemic to the Rio Xingu in Brazil (Altamira and Belo Monte area). Typical inhabitant of rheophilic zones: lives wedged under rounded granite boulders or huge rock slabs in impetuous and warm currents.

Taxonomy and Morphology: Mango Pleco / Magnum Pleco (L047 / Baryancistrus chrysolomus). Possesses the stocky body typical of Baryancistrus, a huge oral disk with robust teeth for scraping. The dorsal fin is very long and connects to the adipose fin.

Social Behavior: Extremely territorial towards conspecifics and other bottom plecos. Claims a "master cave" and attacks with violent shoulder barges, using the interopercular odontodes (cheek spines) as weapons to injure rivals.

Coloration and Sexual Dimorphism: Uniform dark gray-green body, broken by spectacular and wide bright yellow or intense "mango" margins that completely border the dorsal fin and the caudal fin. Males more squared with longer spines on the cheeks.

Aquarium Setup: Needs huge overlapping smooth rocks that create deep dark tunnels where to hide. Filtration must be titanic to handle its enormous organic load (woody feces). Hyper-oxygenated water via powerful movement pumps.

Diet and Feeding: Omnivorous Auffuchs-grazer. Scrapes rocks for algae and microfauna. Provide balanced bottom tablets (spirulina and krill), soft woods to munch on, and sweet potatoes or zucchini. Rarely eats floating food.

Water Quality: Demands high and constant tropical temperatures (27-32°C / 81-90°F). Temperatures below 26°C (79°F) stop its metabolism, leading it to a lethal lethargy in which it stops feeding and dies of starvation.

Compatibility and Tankmates: Ideal with surface or mid-water fish resistant to extreme heat (Discus, Geophagus, Uaru, large characins). Avoid introducing other territorial plecos in the same tank unless you have a bottom footprint greater than 150 cm (60 inches).

Aquarium Reproduction: Rare and difficult reproduction, obtained in narrow caves (terracotta tubes) with very strong direct current. The male traps the female, fertilizes the huge cluster of yellow eggs and obsessively fans them for weeks.

Risks and Diseases: Very high post-importation mortality rate. They often arrive with completely hollow bellies. NEVER use copper-based medications (they suck up the residues from the bottom), and avoid thermal shocks during water changes.