Lesser Silver Mud Carp
Gymnostomus lobatus
A plain silver minnow that moves in millions through the Mekong every year.
About
The lesser silver mud carp (Gymnostomus lobatus) is a small cyprinid with an outsized role in one of the world's great river systems. Native to the Chao Phraya, Mae Klong, and Mekong basins across Thailand, Laos, Cambodia, and Vietnam, this fish is thought to be the single most abundant species by numbers in the Mekong mainstream. Its appearance is unassuming, a plain, slender silver body with no dark markings on the caudal peduncle, a noticeably projecting snout, and around 32-33 lateral line scales, but what it lacks in flash it more than makes up for in ecological significance. Each year, vast shoals participate in migrations along the Mekong, and this species consistently leads the way in sheer numbers. These groups use a rotating leadership approach to navigate around obstacles like Khone Falls, with individuals constantly swapping positions at the front until a viable route is found. It is a critical prey species for many large predatory fish in the region and is even targeted by Irrawaddy dolphins. In the aquarium, it is a beginner-friendly, peaceful fish that does best in groups and appreciates some water movement to mimic the varied currents of its natural habitat.
Similar species
Other fish you might consider
Good tank mates
Species that tend to coexist peacefully with Lesser Silver Mud Carp
From the same region
Share the same natural habitat. Great for a biotope-themed tank
Frequently asked questions
- How big does the Lesser Silver Mud Carp get?
- The Lesser Silver Mud Carp reaches about 3.5–6" as an adult.
- Is the Lesser Silver Mud Carp aggressive?
- The Lesser Silver Mud Carp is generally peaceful and suits a community tank with similarly calm tankmates.