Korsaranthus is a genus of sea anemones in the family Actiniidae.

It is a vividly coloured red and white striped anemone.

Red and pink lines radiate outwards from its mouth.

[2] The spinnaker anemone is endemic to the South African coast, from False Bay to Durban.

It is mobile and may be observed, when not attached to the reef, using its parachute-like walking disc to sail to new locations.