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Maximum size : 16 cm

Siamese Algae Eater - Crossocheilus oblongus : Complete Fish Profile & Care Guide

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The Siamese Algae Eater (Crossocheilus oblongus) is a fascinating addition to any community aquarium, with its sleek and elongated body that gleams in pale grey or gold hues. These active and social fish thrive in groups or as a solitary pet, making them an excellent choice for beginners and experienced aquarists alike. These peaceful creatures enjoy an environment that includes many broad-leaved plants where they can graze on algae and rest. You can safely house them with various passive community fish, which adds to the appeal of these friendly creatures. One of the most distinctive features of the Siamese Algae Eater is its thick black stripe that runs from the nose to the tail. This stripe, which can fade during mating displays or times of stress, adds to the fish' s striking appearance. The clear caudal fin and Rostral barbels give them an almost whimsical charm that can bring a unique element to any aquarium.

Siamese Algae Eater Photos

Sexual Dimorphism

Distinguishing between male and female Siamese Algae Eaters can be challenging, as the visual differences are subtle. Typically, female specimens will have a broader body frame in comparison to males, while males tend to be more slender.\r\n

Quick Facts

Scientific NameCrossocheilus oblongus
Year Described1823
Other NamesNone
OriginsThailand Malaysia
Max Size16 cm
Aquarium LevelBottom
DifficultyBeginner - Intermediate
Best kept asN/A
Lifespanup to 10 years

Water Parameters

Water TypeFreshwater
PH6.5 - 8.0
GH5 - 20
KH5 - 10
75 - 79
23.9 - 26.1

Natural habitat

The Siamese Algae Eater is a fascinating fish that is native to Southeast Asia. This species can be found in the Chao Phraya and Mekong Basins, as well as the Malay Peninsula. In their natural habitat, they inhabit streams and rivers with dense plant life and slow currents. These waters are slightly acidic and provide a rich environment for the Siamese Algae Eater to thrive. Rocks, plants, and logs provide ample hiding spots for these fish. While half of their time is spent hiding in these shelters, the other half is spent scouring the surfaces for food. Their diet consists mainly of algae, but they also consume other types of organic matter that sink to the bottom of the river. Despite their shy and reclusive nature, the Siamese Algae Eater is a fascinating fish to observe in the aquarium.

How to breed the Siamese Algae Eater

Breeding Siamese Algae Eaters in home aquariums is a difficult task as successful breeding has only been achieved through the aid of hormones in farms. Moreover, determining their sex requires careful observation, making it challenging to breed them even if the water conditions are changed. Currently, there is limited knowledge on how to successfully breed them in home aquariums.

Diet & feeding

The Siamese Algae Eater is an omnivorous fish that will consume various foods, including algae, plant matter, and vegetation. Specifically, they are efficient at consuming algae off live plant leaves. However, it is essential to provide a balanced diet to ensure optimal health and growth. A high-quality diet for the Siamese Algae Eater should comprise a variety of foods such as live, freeze-dried, or frozen bloodworm, brine shrimp, or tubifex, along with pelleted foods and algae wafers or vegetable-based foods. Incorporating such foods in their diet will help ensure they receive essential nutrients and maintain a healthy balance.

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