Spotted Raphael Catfish

The spotted raphael catfish has a distinctive look: its body is protected by bony plates, and sharp spines on its fins and body defend it from predators. The dark coloration is marked with contrasting white spots, often just the tips of the spines themselves. A spine wound is painful but not venomous. This "armour" requires special care during transport: do not use ordinary plastic bags. Use only sturdy plastic or glass containers instead. The fish is sluggish and mostly nocturnal, spending much of its time on the bottom among plants, driftwood, or caves. When threatened, it can quickly bury itself in sand.

The spotted raphael catfish lives in the Amazon basin in Bolivia, Brazil, Colombia, and Peru. In nature it inhabits slow, weakly flowing waters with soft silty or sandy bottoms and plenty of driftwood, roots, and leaf litter for shelter. The water temperature there is typically 20–26 °C, pH 5.8–7.5, and hardness varies.

Although this catfish is a carnivore, it can be kept with most fish of similar or slightly smaller size. It prefers to live in groups of its own kind. Its solid protection lets it coexist even with some aggressive fish, such as certain cichlid species.

This species has no special demands on water chemistry and tolerates wide changes in hardness. However, the water must be free of ammonia, which builds up from decaying matter. Weekly partial water changes of about 10% of the tank volume and substrate siphoning will maintain good conditions. Provide many hiding places and dense plants. Use coarse sand or fine, smooth gravel so the fish does not injure itself or clog its gills when burrowing.

The spotted raphael catfish is a carnivore and needs a diet based on protein. Offer bloodworms, earthworms, or tubifex; it also takes frozen meat foods readily. Use dry foods like flakes or pellets only as a supplement. The fish will eat aquarium invertebrates, including snails. Feed daily shortly before the light goes out.

Reliable accounts of breeding this species in captivity are lacking. Published descriptions of spawning are unconfirmed, so successful home breeding is considered unlikely.

The agamyxis catfish is hardy but, lacking scales and with its body structure, it is sensitive to water quality. The main threats are accumulation of ammonia, nitrite, and nitrate from poor filtration or excess organic waste. Poor water conditions and infrequent changes can lead to bacterial skin infections with ulcers or lesions. Prevention means keeping conditions stable, using good filtration, and regularly siphoning the substrate. Avoid sudden swings in temperature or water parameters. When treating illness, remember that some fish are sensitive to certain medications, so dose carefully. Fin and skin damage from rough netting can be a gateway for secondary infections.

When buying, watch for activity at night and check for visible skin damage. Remember that agamyxis catfish have sharp barbed spines on their fins that easily catch on nets, so use plastic containers or glass vessels for transport and moving. A healthy fish has clean skin, solid body shape, and the species' characteristic bright spotted pattern.