What Divers Should Know About Cuttlefish

Known as some of the ocean's most intelligent invertebrates, cuttlefish are captivating subjects for any diver. With one of the largest brain-to-body size ratios among their kin, these marine molluscs display complex behaviors that make observing them a true highlight. Their distinctive W-shaped pupils give them a unique and almost alien appearance as they navigate their underwater world.

Typically measuring between 15 to 25 cm, though the impressive giant cuttlefish can reach up to 50 cm, these masters of camouflage are always a treat to spot. Controlling their buoyancy with a unique internal shell called a cuttlebone, they move with remarkable grace and precision. Should a diver startle a cuttlefish, they might witness the creature deploying a defensive cloud of brown pigment, an action historically prized for its 'sepia' ink.

While their vibrant lives typically last only about 1 to 2 years, every encounter with a cuttlefish promises a memorable moment. Keeping an eye out for these fascinating cephalopods in marine environments is always rewarding, offering a glimpse into one of the ocean's most intriguing inhabitants.