My palmas bichir for some reason is not eating for a week now. I would put a shirmp in front of him and he would put a little in his mouth and then spit it out. Has anyone ever came across this type of problem and knows what is the best remedy. My last feeding before the shrimps was beef heart, and tilapia. All my other bichirs eat the samething, but for some reason my palmas just stopped eating.