what is the size of the Endie. whan mine were 10, 11 inches I feed them once a day 6 times a week a verity of foods fish ,shrimp, krill, clam, lance fish. sand eels ,beef heart, smelt and tailopia. they are now 18, 20 inches now I feed them every other day. diffrent factor determine size and growth, water perameters, temp ,space, food and genetics. not feeding your Bichirs for a couple of days want harm them in nature they don,t eat every day. and in captivitythey tend to be less active but the Senagalus are vary active. and they exspend a lot of energy.