Page "Tetraodontidae" Paragraph 10

Reproduction in freshwater species varies quite a bit.

The dwarf puffers court with males following females, possibly displaying the crests and keels unique to this subgroup of species.

After the female accepts his advances, she will lead the male into plants, moss or another form of cover, where she can release eggs for fertilization.

The male may help her by rubbing against her side.

This has been observed in captivity, and they are the only commonly captive-spawned puffer species.