Octopuses are mollusks, and their heads are oval. Unlike fish, they have neither fins nor gills. They only have head and brachiopod, and the connection position between head and brachiopod is not obvious. Octopus has a large compound eye on its head, and there are eight brachiopods under its head, each of which has two rows of fleshy suckers. There is a mouth at the part where the wrist and foot connect with the head, which will not be found if you don't observe carefully. There are many species of octopus with different body shapes. The wrist length of Octopus ocellatus is generally about 12 cm, that of Octopus ocellatus is about 48.5 cm, and that of Octopus ocellatus is about 32.5 cm.

1. Fish tank: If you want to raise octopus, you should prepare a suitable fish tank. Different species of octopus have different sizes, so breeders need to prepare fish tanks according to their sizes. Also add some sand and gravel and aquatic plants to the fish tank, so as to better restore the marine environment.

2. Water temperature: Pet octopus and ornamental octopus also have certain requirements for water temperature. They all live on the seabed, and the water temperature will not be very low. During artificial breeding, it is necessary to keep the water temperature above 15 ℃, but the maximum should not exceed 32 ℃.

3. Food: Octopus likes to eat some shells, shrimps, crabs and other foods best. When cultured artificially, you can choose to feed some shrimps, shells and other foods. If it is alive, it is best.