Taxonomy & naming
Amblydoras gonzalezi was described by the Venezuelan ichthyologist Agustín Fernández-Yépez in 1968. It belongs to the family Doradidae, the thorny or talking catfishes, a large South American radiation of armoured catfishes named for the audible sounds many species produce by grinding their pectoral spines and by vibrating their swim bladder. The genus Amblydoras is one of several small-bodied doradid genera and the Catalog of Fishes treats gonzalezi as a valid species within it.
As with much of Doradidae, older literature and some historical combinations have shuffled genus placements within the family, but current authority keeps this species in Amblydoras. The species epithet honours a collector or colleague named González, following the common naming convention of dedicating a species to a person; specific etymological detail beyond the honorific is not confirmed in the sources consulted here.
Morphology
Like all doradids, Amblydoras gonzalezi lacks true scales. Instead its flanks are protected by rows of bony plates, or scutes, with the plates along the lateral line typically bearing small hooked or thorny points — the feature that gives the family its common name "thorny catfish". The body is elongated and moderately compressed, with a flattened head, barbels around the mouth for locating food by touch and smell, and stiff, serrated spines that lock into place at the leading edge of the dorsal and pectoral fins.
The species is small for a catfish, reaching a maximum reported length of about 4 in standard length. That is genuinely compact by catfish standards, but the scuteless-yet-armoured skin and locking spines are present even at that size, so the same handling cautions that apply to much larger doradids still apply here.
Habitat
Amblydoras gonzalezi is native to the Orinoco River basin and the Casiquiare canal, the natural waterway that links the Orinoco and Amazon systems, with records from Colombia and Venezuela. The type locality is in Colombia.
Water across this range is warm and generally soft to neutral, in keeping with the broader Orinoco lowlands. Data on this exact species' preferred pH and hardness in the wild is not detailed in the sources consulted; care parameters below are drawn from closely related congeners in the same genus rather than from direct measurements of A. gonzalezi populations.
Feeding
Amblydoras gonzalezi is a nocturnal, bottom-dwelling omnivore. Related Amblydoras species forage the riverbed after dark for small invertebrates and organic detritus, using their barbels to locate food in low light or murky water, and the same pattern is expected for this species.
In the aquarium, congeners take sinking pellets, frozen foods and a range of prepared foods without difficulty. Feeding after the lights go out matches the fish's natural rhythm and helps ensure it gets a fair share in a mixed-species tank rather than losing out to more visible daytime feeders.
Mating
No description of courtship or spawning behaviour for Amblydoras gonzalezi was found in the sources consulted. Data is sparse for this species specifically; nothing here should be inferred from unrelated catfish families with very different reproductive strategies.
Breeding
There are no confirmed aquarium breeding reports for Amblydoras gonzalezi in the sources consulted, and related Amblydoras species (A. nauticus, A. hancockii) likewise show no documented captive spawning. The fish reaching the trade are believed to be wild-collected rather than farm- or hobby-bred. Anyone attempting to breed it should treat the mode as unknown rather than assume open-water egg-scattering or any other pattern seen in different catfish families.
In the aquarium
Amblydoras gonzalezi stays small for a catfish, topping out around 4 in SL, so it does not need the vast tank that many doradids eventually demand — but it still carries the family's bony-plated, scaleless skin, which makes it more sensitive than scaled fish to copper and some medications; dose treatments conservatively. It also carries stiff, serrated, locking pectoral and dorsal spines that readily snag in a net and can jab the keeper, so it is best scooped and moved in a container rather than netted.
Based on related Amblydoras species, a comfortable range is roughly 73–82 °F at a pH of about 6.0–7.0, with soft to moderately hard water (around 1–10° dH). Provide fine sand or smooth substrate, driftwood and leaf litter for cover, and dim lighting or shaded refuges, since the fish is nocturnal and spends daylight hours hidden. It is peaceful toward tankmates and suits a quiet South American community aquarium; feed sinking foods after dark to make sure it gets fed.
Conservation
The IUCN Red List assessed Amblydoras gonzalezi as Least Concern on 7 October 2020. No critical threats to the species have been documented, and it is not currently considered at risk within its Orinoco basin and Casiquiare canal range.
As with many small, non-commercial South American catfishes, formal population monitoring is limited, so the Least Concern listing reflects an absence of known major pressures rather than intensive study. Habitat integrity in the Orinoco and Casiquiare systems remains the relevant long-term consideration for this and similar small doradids.