Crossocheilus Langei

Datasheet

General Description

The Siamese Algae Eater, scientifically known as Crossocheilus Langei, is a peaceful fish species belonging to the Cyprinidae family. It is commonly traded in the aquarium hobby under names like 'Siamese algae-eater' or 'Siamese flying fox.' This fish is characterized by its dark body stripe, laterally-striped appearance, and unique feeding behavior that includes grazing on algae, diatoms, and other microorganisms.

Aquarium Setup

The Siamese Algae Eater thrives in a well-maintained tank designed to mimic a flowing river or stream environment with a substrate of rocks, gravel, and boulders. It is recommended to have roots and branches for hiding spots and to promote natural behavior. Plants like Microsorum, Bolbitis, or Anubias can be attached to the decor, and bright lighting encourages algae growth for the fish to graze on. Adequate water movement and high oxygen levels are crucial for their well-being, requiring spotless water conditions to thrive.

Behaviour

Often found in loose aggregations in nature, the Siamese Algae Eater exhibits shoaling behavior with a distinct pecking order. It is best kept in groups of six or more to prevent bullying of weaker individuals. When maintained in the recommended group size, these fish display interesting interactions and a more natural shoaling behavior.

Feeding and Diet

Crossocheilus Langei is renowned for consuming black brush algae (BBA) in aquariums, making them popular among hobbyists maintaining planted tanks. In their natural habitat, they feed on algae, diatoms, and phytoplankton. A balanced diet for these fish includes high-quality dried foods with added Spirulina, fresh vegetable matter like peas and spinach, and biofilm that forms on surfaces in the tank.

Reproduction & Dimorphism

Reproduction of the Siamese Algae Eater is not common in aquariums, with young fish available in the trade likely obtained through hormone-induced methods. Mature females tend to be thicker-bodied than males, making sexual dimorphism challenging to determine in young fish based on external characteristics.

Habitat and Distribution

The Siamese Algae Eater is native to Borneo, Peninsular Malaysia, southern and western Thailand, and possibly southern Myanmar. It inhabits flowing streams with substrates of boulders, pebbles, and driftwood where it grazes on biofilm. While the exact distribution of some Crossocheilus species in Thailand requires further study, the species is typically found in clear, shallow waters with abundant sunlight and rich biofilm.