Its so sick mines did that today with a piece of pellet and close to gators rollPoly-Deathroll once you saw this one you'll never be amazed by other fish again. (warning you should have no sharp decor or anything that your fish bump to cause this may cause accidents) I've had my senegal done it.
Tips how to: Fillet a fresh meat of tilapia, make sure it's much big (means not a snackable size preferably 3-4x the size of the head) then feed it, then observe.
Lol that senegal can survive outside for a bit due to its lungs i live these fishI first saw polys 6 years ago and I immediately fell in love with them. Being extremely new to the hobby, I housed a senegal with two dwarf gouramies with no air pump or filter whatsoever. Guess who died the next day... Now I have a spoilt 9 inch long senegal and a 3 inch albino senegal in growout. My friends who don't keep fish at all, at most like a betta or something, are always amazed at the sheer size of it compared to a betta.