Cephalopoda
- Cephalopods
- Cephalopod
- Octopus
- Squid
- Cuttlefish
- Nautiloid
- Nautilus
- Ammonite
- Belemnoidea
- Argonaut (animal)
- Anatomy and behaviour
- Cephalopod intelligence
- Cephalopod size
- Cephalopod ink
- Ink sac
- Cephalopod arm
- Hectocotylus
- Tentacle
- Dactylus
- Cephalopod eye
- Chromatophore
- Mantle (mollusc)
- Nidamental gland
- Siphon (mollusc)
- Squid giant axon
- Cephalopod shells
- Cuttlebone
- Septum (marine biology)
- Aptychus
- Orthocone
- Phragmocone
- Siphuncle
- Body chamber