Enteroctopus megalocyathus, also known as Patagonian red octopus (EN), Pulpo del sur (Chile) and Pulpo colorado (Argentina), is a medium-sized octopus and the type species for the genus Enteroctopus.

It is a major dietary component of beaked skates (Dipturus chilensis), spiny dogfish (Squalus acanthias),[9] and the South American sea lion (Otaria flavescens).

In Chile ranges from north Patagonia, Chiloé Archipelago to Strait of Magellan and even more at 56°S,[11] and in Argentina from the San Matías Gulf to the Beagle Channel, including the Falkland Islands[3] and the Burdwood bank.

[13]In general it is an opportunistic predator and eats crabs, teleost fishes, some molluscs[14] e.g. clams, mussels, sea snails among other prey.

In Southern Chile, specifically in Los Lagos region, the adult octopuses prefer to eat big crabs like jaiba reina,[15] jaiba peluda[15] and even other E. megalocyathus as they are cannibalistic,[16] as well as other species; meanwhile the younger octopuses prefer to eat jaiba mora,[15] crab eggs, shrimp[17] and squat lobster or langostino de los canales.