Nonsense! We’ve gotten lots of those. Plant your zuccinni too close to pumpkins or similar plants and you get cross pollening.
That’s what it looks like - a cross between a zuke and a pumpkin.
The students grew it large to save the seeds. Bet it tastes better at a smaller size.
The only problem with that is the pumpkins will take over your garden.
In the early 90’s, I did just that with acorn squash and pumpkins.
Let me tell you, the acorn squash were HUGE!
One of them IIRC was like 21 inches long!
Yup! Any cucurbit will cross-pollinate. I’ve has some real WTF’s pop out of seemingly nowhere.