My senegal bichir has a mouth circumfrence big enough to fit 2 small tiger barbs but i have a shoal of tiger barbs and the bichir isn't eating any of them,it did tried stalking but never plunged and swallow the barbs,is it because of the shoal size(20 something) or is it traumatic experience the bechir has gone through(being almost swallowed by a jaguar in another tank,being bitten by a flowerhorn several times for moving all over the place) but it is not sick since it eats pellets.