Hypancistrus inspector

These catfish grow up to 14–16 cm in length. They are characterized by a flattened body, a rather large head, and large fins, the first rays of which are modified into sharp spines. The skin of Hypancistrus inspector is hard and rough to the touch due to many small prickles. The coloration is dark, dotted with bright, contrasting spots. While males appear slimmer and their spots have a yellowish tint, females, on the contrary, are more stocky, with white speckles in their coloration.

Its natural habitat is in South America, specifically in the upper Rio Negro basin in Amazonas state, Brazil, and in the Casiquiare — the natural channel linking the Negro with the Orinoco in Venezuela. This catfish prefers to live in streams and small rivers with fast currents, which are characteristic of hilly terrain. The beds of these water bodies often consist of rocky substrates and are often cluttered with fallen trees and branches.

This peaceful and calm fish will not create problems for other aquarium inhabitants. It is well compatible with other non-aggressive and non-territorial species of comparable size. Hypancistrus inspector can be kept singly or in a group. However, it is not recommended to keep different Hypancistrus species together to avoid hybridization.

For a group of 3–4 catfish, the optimal aquarium volume starts from 250 liters. Their keeping requires creating conditions as close as possible to natural ones. It is recommended to use a sandy-stony substrate with boulders of various sizes, supplementing it with natural or artificial snags and other decorative elements that can serve as shelters. The presence of live plants is not mandatory. Hypancistrus inspector is highly sensitive to water quality and tolerates even slight accumulation of organic waste poorly; therefore, weekly water changes of 30–50% of the volume are mandatory. The installation of a productive filtration and aeration system, often combined in one device, is also necessary.

In the wild, the fish's diet consists of small aquatic invertebrates and various organisms. In aquarium conditions, it is important to provide a varied diet, which should include both live and frozen foods, such as bloodworms, daphnia, artemia, and dry foods — sinking flakes and granules.

Reproduction is possible under favorable conditions, such as high water quality and a balanced diet, but ensuring these can be a challenging task. It is important to provide shelters in the aquarium decor that will serve as spawning sites. In an artificial environment, the breeding period does not have strict time limits. When the mating season begins, the male occupies a certain area on the aquarium bottom and begins to court the females, enticing them. Once one of the females is ready, the pair retreats to the chosen shelter, where several dozen eggs are laid. After this, the female leaves the spawning site, and the male remains to protect the clutch and care for it until the fry emerge.

Most health problems in fish often arise from unsuitable keeping conditions. Maintaining a stable and comfortable habitat is a key factor for successful keeping. If symptoms of illness appear, the first step is to check the water quality. If deviations are found, it is important to take immediate measures to eliminate them. If the symptoms do not disappear or worsen, medicinal treatment may be required.

When choosing a Hypancistrus inspector in a store, attention should be paid to the fish's overall activity during twilight hours and the condition of its external integuments. A healthy individual should have clean coloration without whitish film, ulcers, or damage to the body and fins. It is important to ensure that the fish's eyes are clear and its abdomen does not appear sunken, which may indicate chronic malnutrition or the presence of parasites. Avoid purchasing specimens that appear apathetic, constantly lie in open areas, or show signs of emaciation, as this species is sensitive to water quality and stress during transportation. — Check for any damage to the fins and the presence of all spiny rays. — Ensure the fish shows interest in food and actively explores the aquarium bottom. — Avoid individuals with an unnaturally bloated or severely sunken abdomen.