Cuttlefish, a type of cephalopod, have demonstrated the ability to delay gratification in a test similar to the marshmallow test conducted with children. The study found that cuttlefish could wait for their preferred food for up to 50-130 seconds, comparable to chimpanzees and birds. Researchers speculate that this ability to delay gratification may be related to the cuttlefish's foraging behavior and optimizing food choices.