Gar lying on bottom of tank

I own a longnose gar that's about 11 inches and he's been lying on the bottom of the tank for the past couple of days, rarely surfacing. I performed a water change a week ago just tested for ammonia which was good and ph which was neutral. The clown knife and the senegalus seem to be doing great so i'm am confused. Some feedback would be great, thanks, matt

Just put in about 20 feeders and he's polished off more tham half in about 20 minutes...maybe he was just bored. thanks alot much appreciated