Sure, you can grow them together! They aren’t capable of cross-pollinating with each other. Cantaloupes may cross-pollinate with other muskmelons, but watermelons typically only cross-pollinate with other watermelon varieties.
Even if they did cross-pollinate, the melons you get this year won’t show any signs of it. However, if you were to plant the seeds of those melons, you would get hybrids.
Sure, you can grow them together! They aren’t capable of cross-pollinating with each other. Cantaloupes may cross-pollinate with other muskmelons, but watermelons typically only cross-pollinate with other watermelon varieties.
Even if they did cross-pollinate, the melons you get this year won’t show any signs of it. However, if you were to plant the seeds of those melons, you would get hybrids.