The Otocinclus, often called ‘dwarf suckermouths’ or ‘otos,’ is one of the smallest species of suckermouth catfish. It grows on average between 1.5 to 2 inches in length upon full maturity. Their compact size, peaceful demeanor, and algae-eating habits make them ideal residents for small to medium-sized community aquariums.
The gender of the Oto can influence its size, with females generally being slightly larger and rounder as compared to males. Regardless of their gender, their petite dimensions and hardworking nature position Otos as desirable additions for maintaining the cleanliness of the aquarium.