Weird spoon with ridges i found in a rented place. Whats it for

Slides off citrus

Grapefruit knife (curved double blade)

Halving grapefruit at table

Needs skill, dangerous

Serrated spoon (your photo)

Eating segments, kiwi, mango, avocado

Almost zero

Most chefs today skip the knife and just use the spoon.

Where to find one