Pseudomugil helodes Ivantsoff & Allen, 1984 The marine sailfin silverside (Kalyptatherina helodes) is a species of sailfin silverside endemic to Indonesia, where it is only known from mangrove swamps around Misool and Batanta Islands.

This species grows to 4.5 cm (1.8 in) total length.

[1] It is the only known member of its genus.

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