It’s for grapefruit. https://www.amazon.com/Pieces-Stainless-Steel-Grapefruit-Serrated/dp/B01N92I6V0
There are various tooth edged spoons with the various amounts of teeth that are designed for grapefruit some have more teeth some have less but it’s designed to separate the meat from the skin and pull it out of the halved grapefruit leaving the dividers in place so that you get some nice juicy grapefruit instead of chewy segment skin.
Naw, it’ll be our grandkids.