Can I still eat abalone that was prepared and stored in the refrigerator for one day?
Generally speaking, whether abalone that has been cleaned and refrigerated can still be eaten the next day depends on its specific condition and storage method. If there are signs of spoilage, it is not recommended for consumption. The details are as follows:

If the abalone is immediately rinsed with clean water after being cleaned, with internal organs and mucus removed, surface moisture blotted dry using clean kitchen paper, then stored in a sealed container or tightly wrapped with cling film and placed in the refrigerator's chiller compartment—and if the fridge is not frequently opened—then it is safe to eat the next day provided there is no unpleasant odor and the flesh remains firm and elastic. Simply ensure thorough heating during cooking.
However, if the cleaned abalone has been left at room temperature for an extended period or placed directly into the refrigerator without proper sealing, bacteria may easily grow and cause spoilage. In such cases—when the flesh becomes slimy, emits a fishy odor, or feels soft and mushy when pressed—the abalone must not be consumed.
When purchasing abalone, choose live ones and process them promptly after cleaning. If not consuming within a short time, consider freezing for storage. Always cook thoroughly before eating. Leftover cooked abalone should also be sealed and refrigerated, consumed within one day, and reheated thoroughly before eating again.