I have no experience on bichir fry but I saw a reference with an info you might like.
'Some species have been bred in captivity. During spawning, the male spreads out his anal fin so that it is slightly cupped and places it beneath the vent of the female. The eggs and sperm are expelled into the cupped fin. Some species, for example P. ornatipinnis, lay their eggs among plants, while others such as P. palmas let them fall to the bottom. Hatching takes four to five days but the fry are not free swimming untol a few days later. They will take newly-hatched brine shrimp.'
Reference: The Ultimate Encyclopedia of Aquarium Fish and Fish Care by Mary Bailey and Gina Sandford
Again, I have no experience regarding the breeding of bichirs but I hope this might help you.
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