Common octopus
The Animals (Scientific Procedures) Act 1986 regulates scientific procedures which may cause pain, suffering, distress or lasting harm to "protected animals"; it refers to these as "regulated procedures". Protected animals are defined in the Act as all living vertebrate animals, except man, as well as one invertebrate species, the common octopus. The octopus was added 12 years ago after extensive discussion concluded that its well developed nervous system may make it capable of feeling pain. However, no regulated procedures have been carried out using the octopus since its inclusion.