The common cuttlefish is a soft-bodied marine mollusc found in shallow coastal waters from the eastern Atlantic and Mediterranean to the coasts of Africa. Related to squids and octopuses, cuttlefish are celebrated for their extraordinary intelligence, spectacular color-changing abilities, and sophisticated hunting behavior. Though they live only 1-2 years, they compress remarkable behavioral complexity — including play and apparent deception — into their short lifespans.
About the Cuttlefish
Sepia officinalis
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💡 Fun Facts
01
Cuttlefish have the highest brain-to-body ratio of any invertebrate and have demonstrated the ability to delay gratification in food-choice tests — a trait previously thought exclusive to large-brained vertebrates.
02
They can change skin color and texture in under one second using three layers of specialized cells: chromatophores, iridophores, and leucophores.
03
Despite having no color-sensing cones in their eyes, cuttlefish perfectly match colorful backgrounds — researchers believe they may use pupil shape to decode color via chromatic aberration.
04
Their internal shell, the cuttlebone, is a buoyancy organ with gas-filled chambers that allows precise depth control to the nearest centimeter.
05
Male cuttlefish can split their body display — showing a female-mimicking pattern on one side to sneak past a rival male while courting a female on the other.
📍 Where to Find This Animal
Habitat Types:
Shallow Coastal Seas
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