Spiny Talking Catfish

Geographic Origin and Biotope: Common in the Amazon and Essequibo rivers (Brazil, Guyana). It is commonly found in slow and stagnant forest streams, often buried in soft mud or under inextricable tangles of submerged leaves and roots.

Taxonomy and Morphology: Talking Catfish (Acanthodoras spinosissimus). "Twin" and massive species of the genus. The adjective "spinosissimus" is indicative: the lateral plates are even more serrated and protruding, capable of cutting like blades. Produces loud "croaks" (grunts).

Social Behavior: Totally peaceful if not bothered. Its survival strategy is the "bunker": it does not attack, it wedges itself into rocky crevices or wood erecting its spiny pectorals like wedges. Absolutely nocturnal.

Coloration and Sexual Dimorphism: Similar to A. cataphractus but often darker and with less defined lateral bands (more fragmented or dotted). Dark white/pinkish belly. Adult females unmistakably swollen compared to males.

Aquarium Setup: 100 cm (40 inches) tank, densely planted and shaded by intricate roots. Demands darkness and, imperatively, fine sand: it will dig the bottom until only its mouth and eyes emerge during the day, feeling safe.

Diet and Feeding: Ravenous nocturnal scavenger. Waking up in the dark, it sifts the bottom feeding on every leftover: live tubifex, bloodworms, debris, and sinking granules. Important to ensure food is not consumed by diurnal fish.

Water Quality: Very resistant to chemical variations (within reasonable limits) and temporary hypoxia. It is essential to keep the water tannic and clean, with a moderate or slow flow so as not to disturb its diurnal aestivation.

Compatibility and Tankmates: Matches perfectly with Dwarf Cichlids (Apistogramma, Microgeophagus), small Tetras and Hatchetfish. It does not actively defend itself if bitten: its armor deters any predator, but annoying fish (like large Loaches) can stress it.

Aquarium Reproduction: Almost impossible or fortuitous in the home aquarium. Substrate spawners: they clean holes or ravines and the larvae are microscopic, immediately requiring infusoria and rotifers for growth.

Risks and Diseases: "Net" danger: use only and exclusively glass/plastic containers to catch it, to avoid irreparable injuries (to the person and the fish). Sensitive to Copper and Ich medications.