What type of melon is it?

[Grub80]

Hi all, can you help in identifying what type of melon am I growing? Me ole mate (ie elderly father), hade some melon seeds and planted them in. Surprise surprise the melons? Are growing. Photos attached. I am growing rock melons, and have photo attached for a comparison. Cheers all super sleuths!

   What type is it?  Rock melons 

[Jason]

You might have to wait until it's time to cut one open @Grub80! 

We've had a similar mystery on Workshop before thanks to @QuailFlock - https://www.workshop.com.au/t5/Garden/Melon-Pumpkin-Or/m-p/10909 - It turned out to be a sharkfin melon, which I hadn't heard of before.

Let me tag some of our resident garden gurus who might be able to give you some clues. @Adam_W, @Noelle, @CathM.

Jason

[Noelle]

Bit hard to tell just from the foliage. All melons and family have quite similar leaves. May be a bit easier as the melons develop.  Any thoughts @Adam_W ?

[Adam_W]

I'l go with you on that one @Noelle
As soon as you are talking a group of plants that have entire books dedicated to them you know there is potential for confusion...
Not helped if they have self-seeded from a commercial variety as they are likley to revert back to a more basic form that may not resemble the original plant or fruit. It will in basic ways, such as leaf form and fruit type, but beyond that there can be a lot of diffference.
I'd suggest grow it on & see what develops!
Melons are actually pretty handy in the veggie garden anyway as they work like living mulch. They help keep soil cooler & retaining more moisture.