Cephalopod

Cephalopods were a type of animal which included octopi, squids, cuttlefish and the like. (TV: Spearhead from Space)

Throughout the universe, various cephalopod species existed. This was one of the many shapes that recurred throughout the universe, along with insectoid and humanoid. The Nestenes were a sentient, hive minded race who, in their natural form, were cephalopods. (TV: Spearhead from Space)

Ianto Jones described his boyfriend Jack Harkness as being sexually attracted to cephalopods on the same level as both men and woman. (PROSE: The House that Jack Built)