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Title Burmese Rosy Loach

Sara Waller

Last Updated



A brief description of the Burmese rosy loach.


The Burmese rosy loach (undescribed, possibly Petruichthys sp.) is a small fish native to eastern Myanmar and northern Thailand.  This fish grows to an adult size of between .98 and 1.18 inches long.  Adult females are noticeably larger and rounder bellied than males and have a brownish base body color overlaid with many irregular dark spots and small blotches, with a darkish lateral stripe broken into a series of blotches in some specimens.  In the smaller, slimmer males the base body color is pale orange, becoming much brighter and more intense in breeding individuals, particularly in the posterior portion of the body.  When dark spots are present they tend to be restricted to the dorsal surface of the fish, and the lateral body stripe is usually solid.


The Burmese rosy loach is found alongside the celestial pearl danio in it's native habitat.                                                                                                                                                         

The Burmese rosy loach should be maintained in an aquarium of 20 gallons or larger.  A dark colored soft, sandy substrate (CS6631) is a good choice.  Driftwood (ZM2000) and leaf litter (CS706) make good additions.  Live plants are highly recommended.       

The Burmese rosy loach prefers a temperature of 68°F to 79°F, a pH of 6.5 to 8.0, and a hardness of 5 to 25°H.  


The Burmese rosy loach is peaceful and surprising bold for it's diminutive size.  Good tank mates include celestial pearl danios, dwarf emerald rasboras, chili rasboras, ember tetras, gold tetras. and small catfish such as otocinclus and corydoras.  Avoid large or overly aggressive species.  These small loaches are highly gregarious and should be kept in groups of 8 to 10 or more.


Unlike most loaches, Burmese rosy loaches spend a lot of time in the open, often hovering midwater, forming schools, and exploring all levels of the aquarium.


In the wild, the Burmese rosy loach is thought to be a micropredator feeding chiefly on small insects, worms, crustaceans, and other zooplankton.  In the aquarium it will readily accept most prepared foods, as well as frozen and live items.  Good choices include sinking pellets (AL166) and frozen bloodworms (SF4792) or brine shrimp (SF6777), and live black worms.  For maximum color, growth, and health these fish will look their best when given probiotics (AL169) in addition to a balanced diet.


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