Telmatherina is a genus of sailfin silversides endemic to the Indonesian island of Sulawesi.

They are restricted to the Malili Lake system, consisting of the large Matano and Towuti, and the small Lontoa (Wawantoa), Mahalona and Masapi.

[1] Telmatherina are fairly small fish, with a maximum length of 4.7–8.4 cm (1.9–3.3 in) depending on the exact species.

For example, the fish egg-eating T. sarasinorum also frequently take snails, insects and shrimp, while the fish-eating T. sp.

[5] Species feeding mainly on insects or snails tend to have an intermediate body shape, being neither as slender as fish-eaters, nor as high-bodied as egg- and shrimp-eaters.