Cuttlefish

Fascinating facts about the Cuttlefish

• The common cuttlefish migrates each year, spending the warmer spring and summer months close to shore where it spawns. As temperatures fall, it descends to deeper waters, typically between 100 and 200 metres, to overwinter. This movement lets the species use shallow, sandy or muddy seabeds for breeding and then exploit cooler, offshore habitats during the colder season. Its ability to tolerate brackish water also broadens the range of suitable coastal environments.
• Reaching up to 49 centimetres in mantle length and weighing as much as 4 kilograms, the common cuttlefish ranks among the largest of its kind. In temperate waters this size is typical for mature individuals, while those from subtropical regions remain considerably smaller. Subtropical cuttlefish rarely grow beyond 30 centimetres and usually weigh no more than 2 kilograms, reflecting the influence of warmer habitats on growth limits.
• Research shows that cuttlefish embryos can be conditioned by the prey they see inside the egg, later favouring that prey as juveniles. A 2008 study found that embryos exposed to crabs subsequently hunted crabs more often than their usual favourite, shrimp. Normally, young cuttlefish prefer shrimp, but visual exposure to crabs rewires this preference, demonstrating an early learning effect on diet selection.
• Male common cuttlefish can load as many as 1,400 spermatophores onto a female during a single mating, while a female may hold between 150 and 4,000 eggs, the exact number scaling with her body mass. These animals reach sexual maturity at 14-18 months and then gather in large breeding groups each spring and summer. After spawning, many individuals die, limiting the lifespan to about two years.
• Even before they hatch, common cuttlefish can actively manipulate the pigment cells in their skin, producing colour changes from within the clear-membraned egg. Their skin contains chromatophores, leucophores and iridophores that work together to create rapid colour shifts and texture alterations. This early-born camouflage ability allows hatchlings to blend with the substrate as soon as they emerge, enhancing survival from the first moments of life.

Sources

Every fact above was checked against these pages, and kept only where one of them states it.

• Wikipedia

At a glance

About the Cuttlefish

In the sun-dappled depths of the ocean, the cuttlefish glides with an ethereal elegance, its undulating body a masterclass in soft-bodied agility, as it weaves through coral reefs with an uncanny ability to change color and texture, rendering it all but invisible. With a fluidity that belies its intelligence, it navigates the complex social hierarchies of its underwater world, a shape-shifting enigma that has captivated the imagination of all who have been fortunate enough to witness its mesmerizing dance. As it pulses and flows like a living, breathing embodiment of the sea itself, the cuttlefish embodies the very essence of marine mystique.

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