Cuttlefish eat less when they know there is shrimp for dinner: Study

Scientists have got proof of cuttlefish's complex cognitive abilities after noticing that when the cuttlefish know that shrimp will be available in the evening, they eat fewer crabs during the day. When the fish were provided with evening shrimp on a random basis, the cuttlefish abandoned their 'selective' behaviour, adopting an 'opportunistic' behaviour to eat more crabs during the day.