[3] The pedal disc is well-developed and the column is short and smooth, divided into a scapus and a scapulus region.
This sea anemone usually lives on rocky substrates and its depth range is from 25 to 420 m (82 to 1,378 ft).
[5] In Patagonia, it has been found living on the shells of gastropod molluscs,[2] and this may be an important settlement site for the sea anemone in areas where the seabed is covered with soft sediment.
[6] Isotealia antarctica is the most important predator of the common Antarctic nudibranch, Tritoniella belli.
However, 70% of captured individuals manage to escape from the tentacles, or are regurgitated from the gastrovascular cavity of the sea anemone.