Aega antarctica fish. It has strong muscles in its oesophagus and large salivary glands and rapidly fills its dilatable hind gut with blood. It then drops off the fish and spends several months on the seabed digesting the blood. In a research study, specimens of "Aega antarctica" were kept in a marine aquarium at the University of Oldenburg, Germany, where they were maintained at a temperature of . It was found that they would feed on a number of species of fish native to the North Sea and in this research they were fed on live European plaice ("Pleuronectes platessa"). One fish
Pinnoctopus cordiformis appear to be consistent differences between specimens identified as "P. cordiformis" and those identified as "O. maorum" which suggests that there is a second species but this species more closely resembles a species of the genus "Enteroctopus", with the description closely resembling "Enteroctopus zealandicus". The name "the name Pinnoctopus cordiformis" is regarded as unresolved, a "nomen dubium", by some authorities. Pinnoctopus cordiformis Pinnoctopus cordiformis is a species of octopus found around the coasts of New Zealand. "Pinnoctopus cordiformis" is identifiable by their orange-brown or purple-grey colouration; iridescent white spots are also found on the arms and web. No white spots