Otocinclus oxyrops – Dwarf Algae-Eater Catfish

The Otocinclus oxyrops, also called the Common Otocinclus or Dwarf Sucker Catfish, is a gentle, efficient algae-eater perfect for planted and nano aquariums. With its slender silver-gray body and calm behavior, this species helps maintain crystal-clear glass, plants, and décor without harming delicate foliage.

Native to slow-moving South American streams, O. oxyrops thrives in well-oxygenated aquariums with clean, stable water. It’s best kept in groups of 6 or more, where they school together and feel secure while constantly grazing on biofilm and soft algae.

🐟 Key Features:

• Peaceful dwarf algae-eater—great for planted tanks
• Natural cleaner that helps control algae growth
• Best kept in schools for active, social behavior
• Ideal for nano and community aquariums
• Safe for shrimp, snails, and small peaceful fish

🌡️ Care Guidelines:

• Temperature: 72°–80 °F
• pH: 6.0–7.5
• Diet: Herbivore – algae, biofilm, blanched vegetables, algae wafers
• Temperament: Peaceful schooling fish
• Size: 1.5–2 inches
• Tank Size: 15 + gallons

💡 Pro Tip: Ensure your tank is mature and well-established before adding Otos—they rely on natural algae and biofilm as part of their diet. Supplement with spirulina wafers and fresh veggies.

Frequently Asked Questions (FAQ):

Q: How many Otocinclus oxyrops should I keep?
A: At least 6—they’re social and happiest in groups.

Q: Are they peaceful?
A: Completely peaceful and safe for shrimp, snails, and community tanks.

Q: Do they eat all types of algae?
A: They graze soft algae and biofilm but won’t eat hard green spot algae.

Q: Can they live in a nano tank?
A: Yes—15 gallons or larger with stable water and plenty of algae is ideal.

Q: Do they need driftwood or plants?
A: Yes—both provide grazing surfaces and comfort.