It means the eggs inside the octopus.

The rice in octopus is actually the eggs of octopus. Because it looks like rice, it is nicknamed rice by people. Moreover, octopus eggs are delicious, contain a variety of nutrients that are beneficial to the human body, and have particularly high nutritional value.

Octopus generally refers to octopus. The body of octopus is short oval, sac-shaped, and has no fins. It is a temperate mollusk that lives underwater and can grow by eating large animal plankton. It likes to hide in caves or crevices on the rocky seafloor. Widely distributed in tropical and temperate waters of the world's oceans.