Cigar Anostomus
Anostomus anostomus

Care Level



Fore Ground



Reef Compatible


Plant Safe


Max Size

5" - 8"

Minimum Tank Size

75 gallon


Black, Red, White, Yellow



Water Conditions

Acidic (5-7.2 pH), soft water (3 to 6 dH), 72 to 82 degrees Fahrenheit


General: The Cigar Anostomus (Anostomus anostomus) is a semi-aggressive fish species from the Amazonian Basin. Naturally, this fish is designed to rasp algal materials off rocks, driftwood, and vegetative matter. The Cigar Anostomus will position itself, head-down, in order to do so. Hence, the alternative common name "Headstander".

Preferred Water Chemistry: Acidic (5-7.2 pH), soft water (3 to 6 dH)

Aquarium Diet (omnivore): Brine shrimp, blackworms, omnivore pellet, Spirulina

Dimorphism: Once mature, female Cigar Anostomus will take on a more gravid appearance.

Compatibility: Although the Cigar Anostomus is a slightly-aggressive schooling species, it should only be kept with other fish species with a similar temperament, and size. Once mature, an individual can become aggressive. Therefore, it is best to keep this species in large schools (7, or more) to prevent a weaker individual from being consistently targeted. Large Tetra, Gourami, South American Cichlids, Silver Dollar, and Denisoni Barb will typically make for good companions of the Cigar Anostomus.

Author: Grant Stevens