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A fixed action pattern (FAP) is a specific, hard-wired sequence of behaviors that occurs in response to an external stimulus, called a sign stimulus. The behavior is “fixed” because it is essentially unchangeable—proceeding similarly across individuals of a species every time it occurs.
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Updated: Feb 20, 2026

Dissection and Flat-mounting of the Threespine Stickleback Branchial Skeleton
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Cuttlefish.

Anne-Sophie Darmaillacq1, Daniel Osorio2

  • 1Université de Caen Normandie, UMR 6552 CNRS -Université de Rennes 1 Ethos, Ethologie Animale et Humaine Equipe Neuroéthologie Cognitive des Céphalopodes Campus Horowitz, Esplanade de la Paix, F-14032 CAEN cedex 5, France.

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This summary is machine-generated.

This guide explores the fascinating biology of cuttlefish. Learn about their unique adaptations and behaviors in this accessible overview.

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Area of Science:

  • Marine Biology
  • Cephalopod Research

Background:

  • Cuttlefish are cephalopods known for their complex behaviors.
  • Understanding cuttlefish biology is crucial for marine science.

Purpose of the Study:

  • To provide an introductory overview of cuttlefish biology.
  • To highlight key aspects of cuttlefish anatomy, behavior, and ecology.

Main Methods:

  • Literature review of existing cuttlefish research.
  • Synthesis of information on cuttlefish physiology and ethology.

Main Results:

  • Cuttlefish exhibit remarkable camouflage abilities.
  • Their complex nervous system supports advanced cognitive functions.
  • Reproductive strategies are diverse and species-specific.

Conclusions:

  • Cuttlefish represent a significant model organism in biological studies.
  • Further research can unlock more insights into cephalopod evolution and intelligence.