Cephalopods

Marine mollusks including squids, octopuses, cuttlefish, and nautiluses.

Articles with this tag: 5 Updated: August 23, 2026

Articles with this tag

Ammonite — extinct spiral-shelled marine cephalopods Ammonite Extinct marine cephalopods of subclass Ammonoidea, known for coiled, chambered shells. Their fossils are widespread and important index fossils; closest living relatives are modern…

Cephalopod (Cephalopoda): biology, evolution, behavior and human uses

Cephalopod (Cephalopoda): biology, evolution, behavior and human uses Cephalopod Cephalopods are a diverse class of marine molluscs—octopus, squid, cuttlefish and nautilus—known for intelligence, camouflage, jet propulsion and a rich fossil record including amm…

Chromatophore: pigment cells and colour change in animals Chromatophore Chromatophores are specialised pigment- or light-reflecting cells that produce skin and eye colour in many cold-blooded animals and enable rapid or long-term colour change.

Coleoidea — the modern shell‑less cephalopods

Coleoidea — the modern shell‑less cephalopods Coleoidea Coleoidea is the cephalopod subgroup that includes octopuses, squids and cuttlefish, distinguished by reduced or internal shells, advanced nervous systems, and diverse marine ecolo…

Colossal squid (Mesonychoteuthis hamiltoni) Colossal squid Mesonychoteuthis hamiltoni, the colossal squid, is a large, deep‑sea cephalopod of the Southern Ocean known for great mass, enormous eyes, distinctive tentacular hooks, and a role…