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Dwarf Sucker (Otocinclus vittatus)

Common Names - Oto Catfish

Dwarf Sucker

Otocinclus vittatus, commonly known as the Dwarf Sucker or Oto Catfish, is a peaceful algae-eating fish, ideal for planted aquariums.

Overview

Otocinclus vittatus, or Dwarf Sucker, is a small, peaceful catfish species from the Loricariidae family. Native to South America, they are known for their algae-eating habits, making them a favorite among aquarists who keep planted tanks.

Growing to only about 4-5 cm, these fish are non-aggressive and prefer to live in groups. They are also well-suited for smaller tanks due to their size and calm demeanor.

Tank Requirements

Otocinclus thrive in aquariums with temperatures ranging from 22-26°C, a pH of 6.0-7.5, and a GH of 6-15. A tank size of at least 60 liters is recommended, especially for a group of these fish, as they feel more secure in small schools.

A heavily planted tank with hiding spots such as driftwood and rocks is ideal for them. Soft substrate, such as sand, is preferable as they like to graze on surfaces for algae. Strong water flow isn't necessary, but maintaining clean, oxygen-rich water is essential.

Feeding and Diet

Otocinclus vittatus are primarily herbivorous, feeding on algae and plant material. In a well-established aquarium with plenty of algae growth, they will find sufficient food on their own. However, in tanks with less algae, they should be supplemented with algae wafers and blanched vegetables such as zucchini or spinach.

It's important to monitor their diet to ensure they're getting enough food, as they can sometimes struggle to find enough natural algae in smaller or newly established aquariums.

Care and Maintenance

These catfish require stable water conditions with low nitrate levels, as they are sensitive to changes in water quality. Regular water changes (20-30% weekly) and proper filtration are necessary to maintain optimal conditions.

Due to their delicate nature, they should not be housed with larger or aggressive fish that may bully or outcompete them for food.

Compatibility

Otocinclus vittatus are extremely peaceful and do well with other small, non-aggressive fish such as tetras, rasboras, and dwarf cichlids. They should be kept in groups of at least 4-6 individuals to reduce stress and ensure natural behavior.

Avoid housing them with larger, predatory fish or fin-nippers, as they may be harassed or even eaten due to their small size.

Breeding

Breeding Otocinclus in home aquariums is difficult and rarely occurs without specific conditions. They are egg-layers, and successful breeding usually requires pristine water conditions, along with plenty of hiding spots for the fry once they hatch.

If breeding does occur, the fry will require finely crushed algae-based food and clean water to thrive.

Note: Unverified Information

This article is part of our freshwater aquarium fish catalog and is currently unverified. The information presented here has not yet been reviewed by a specialist. Please use this content as a general reference and verify details from additional sources before making any decisions related to fish care.