does anyone have a good idea for using the "leftovers" from cleanin fish?

I normally freeze them solid and then thaw them out. I ground them up and use it for chum on my next fishing trip. Some people use the heads for their gardens, some deep fry the tail fin and eat 'em like chips ( did that, not bad) and some people give ( or sell) it to the local farmers. One crazy lady I knew wanted the back bones to make jewelry. There's so much you can do with the scraps if you can imagine it. Most just freeze them and toss it in the trash on trash day....keeps the stink and flies down to a minimum. ~good luck catchin'.

Feed that stray cat in the neighborhood.

Make Hotdogs? lol jk but I would just throw them away or feed it to some stray cats.

I have buried it for fertilizer but heard that you can get nasty disease from eating vegetables grown in it. I have also frozen it and used it as bait to live trap raccoons. I live in the country so just dumping out the leftovers usually means a good snack for something wild around here too.

Bury it for fertilizer. Or if you fish saltwater freeze it and use it for chum. You can make fish stock with it as long as you discard the guts first. If you make the stock you don't want it to boil, just simmer. Simmer means no bubbles just steaming hot.

Oh ok so you have to kil everylast thing you catch?