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GIANT OTOCINCLUS (Hypoptopoma gulare)

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The Giant Otocinclus Catfish is a true rarity, but its extra large size, peaceful disposition, and algae eating prowess make it a highly desirable fish for the community planted aquarium!


The Giant Otocinclus Catfish (Hypoptompoma gulare) is an extra large "Otocinclus" species that is native to the Amazon River Basin. It has a noticeably armored body and flat, pointed snout. Like its close relatives, it is well known and appreciated for its voracious appetite for algae.


The Giant Otocinclus Catfish is primarily herbivorous and will continuously feed on algae in the aquarium, but it will not harm most ornamental plants. It is compatible with most other peaceful fish and invertebrates that enjoy the same water conditions, but it might inadvertently eat very small dwarf shrimp as it scavenges. Relatively high water flow and clean water are necessary for this species. Like most Otocinclus, the Giant Otocinclus Catfish is a schooling species, although somewhat less so than its smaller relatives.


If sufficient algae is not present in your aquarium, the diet of the Giant Otocinclus Catfish can be supplemented with fresh vegetables (such as romaine lettuce, cucumber, or zucchini), algae wafers, or vegetable-based flake food.

What We Like About This Fish:
  • Very uncommon in the aquarium hobby
  • Very social personality
  • Safe with plants
  • Completely peaceful
  • Great algae eater for medium and large tanks 
    • Diet:  Can mostly sustain on algae.  If sufficient algae is not present, diet can be supplemented with fresh vegetables, algae wafers, or vegetable-based flake foods.
    • Social behavior:  Peaceful, schooling/shoaling.
    • Origin:  Amazon River Basin, South America
    • Average adult size:  4 inches (10 cm)