What do u feeds to your bichir ?? I feed mine with some feeding worm(not sure wat worm is it,it's light brown in colour while its flesh is white colour),my ornate bichir which is smaller than yours can eat 2worm per meal.. Here is an article from wet web media.

Feeding/Foods/Nutrition: Types, Frequency, Amount, Wastes
All sorts of meaty foods, live and prepared are accepted by healthy individuals. Shrimp, worms (true and insect larvae like mealworms), crustaceans of all sorts, cut meat (beef heart, horse), frogs, newts, cut and small fishes and more are accepted. Be leery of offering monotonous diets as these fishes can get overly accustomed to nutrient-insufficient foodstuffs.
A feeding stick to direct items near the polypterids, or sinking foods that won't be consumed by everyone else will assure your polypterid is getting his/her grub.
Should yours go on a hunger strike, try a sizeable water change (25%) and offer a live earthworm, mealworm or such on a daily basis. I have yet to see a Bichir starve when offered these.

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