Galaxy Otocinclus

The Galaxy Otocinclus, Parotocinclus haroldoi, is a freshwater fish native to South America that belongs to the family of catfish. Its natural range is moderately fast-flowing sections of the Rio Paranaibo in Brazil. It is an enjoyable algae eater that lives in loose associations with numerous other individuals of its species. With a maximum size of only 5 cm and its characteristic dot markings, it is not only very cute, but also one of the most beautiful representatives of the sucking catfish.

Care in the aquarium

In the aquarium, the Galaxy Otocinclus feels most comfortable in the company of its conspecifics. An aquarium volume of at least 60 liters and a group size of 5 animals or more are part of its minimum requirements. The water should have a good flow, be rich in oxygen and have a temperature between 26 and 30°C. With an optimal total hardness of 5-15°dGH and a pH range between 6.0 and 7.0, the water should also be relatively soft and acidic to neutral. Other peaceful fish such as tetras are suitable for socialization. The substrate should be as fine as possible. Sand or non-sharp-edged, small-grain gravel, but also soil, are a good option for this. Larger stones, roots, caves or tubes as well as strong planting provide hiding places and give the Galaxy Otocinclus a feeling of security. Although it is considered very robust and insensitive to water fluctuations, it should only be used in aquariums that have been running for at least 6 months. This is due to the fact that it feeds almost exclusively on growth in the form of organic and algae films and this is only sufficiently present in well-established aquariums.

Feeding

As with all representatives of the genus Otocinclus and Parotocinclus, the diet of the Galaxy Otocinclus consists of algae growth and biofilm. This need should definitely be taken into account so that the catfish stays healthy. Algae powder such as spirulina or chlorella as well as suitable tablet or granulate food and live or frozen food can also be offered.

Sexual characteristics and breeding

Differentiating the sexes in Parotocinclus haroldoi is relatively difficult. Females are usually slightly larger and fuller than their male counterparts. Breeding the Galaxy Otocinclus in an aquarium should be entirely feasible as long as the water parameters are right and there are no predators. The eggs are laid by the female between stones and roots and fertilized there by the male. Brood care is not carried out. After a few days the young fish hatch, which after a few more days swim freely and feed on biofilm.