Our Octopus Tentacles are Pre-cooked Octopus legs. Octopus have several health benefits and can be prepared in various ways, making it a valuable addition to a balanced diet. It is a good source of calcium, potassium, phosphorus, selenium, vitamin C, vitamin A and several B vitamins, as well as some omega-3 fatty acids. Octopus live longer than squid, making them tougher and therefore a bit more tricky to prepare. But, prepared and cooked well, octopus can be delectable.