juicy.
A slippery or slimy surface is a strong reason to discard it.
Extremely Mushy Texture
Softening can happen with overripeness, but flesh that is collapsing, watery, or unusually mushy may indicate spoilage.
Leaking or Swollen Rind
A watermelon that is leaking, unusually swollen, cracked externally, or under visible pressure should be handled cautiously and discarded.
Why Foaming Watermelon Can Be Dangerous
Fermentation itself can make the fruit unpleasant, but the bigger problem is that obvious spoilage means microorganisms have been growing inside it.
You cannot tell by appearance alone
