The recent sighting of a giant marine slug, or sea hare, on an Anglesey beach has sparked intrigue and raised questions about the future of our oceans. This unusual creature, with its distinctive "rabbit ear" scent receptors, has captured the attention of experts and beachgoers alike.
While smaller sea hares are native to the UK, the Trearddur Bay find is believed to be a rare depilatory sea hare, typically found in the Mediterranean. The historical misconception that touching these slugs causes hair loss adds an intriguing layer to their story.
Emma Leese, who discovered the sea hare, described the moment it returned to the water, unfolding and wriggling like a true slug. Sea slugs, unlike their terrestrial counterparts, cannot survive long out of water, and their unique defense mechanism of releasing purple ink adds to their mysterious nature.
The Mystery of the Black Sea Hare
Speculation initially arose about the possibility of the Trearddur Bay sea hare being a black sea hare, a species native to the Pacific Ocean. However, experts have nearly ruled out this extraordinary possibility. Black sea hares are known for their impressive size, with the largest recorded individual measuring a staggering 99cm and weighing nearly 14 kg.
Frankie Hobro, owner of Anglesey Sea Zoo, expressed excitement at the prospect but acknowledged the extreme unlikelihood of such a find. Instead, the consensus leans towards the depilatory sea hare, a rare UK species that is expected to become more common as our seas warm and their range expands northward.
A Rare Sighting
The depilatory sea hare is indeed a rare visitor to the UK, with confirmed sightings limited to the Isle of Man and north Scotland. Wales has yet to record any official sightings, although anecdotal reports from Pembrokeshire suggest their presence.
As mollusks, sea hares are related to the common garden snail, but instead of an external shell, they possess a thin, transparent internal shell. Their fleshy mantles have evolved into large, wing-like flaps, allowing them to swim gracefully through the water.
The native spotted sea hare, commonly found in the UK, typically reaches 7m in length but can grow up to 20cm. In contrast, the depilatory sea hare can reach an impressive 40cm, dwarfing its British cousins and showcasing its bulkier build.
Handling with Care
Frankie Hobro advises caution when encountering sea hares, as their skin stores noxious chemicals from their algal diet. The historical account of Roman Emperor Titus being poisoned by his brother Domitian using a sea hare serves as a reminder of their potential toxicity.
"They are quite revolting to touch," Frankie warns, emphasizing the importance of leaving marine creatures undisturbed. Their strong suction and delicate nature make them vulnerable to damage if handled improperly.
A Glimpse into the Future
The sighting of this rare sea hare on an Anglesey beach serves as a fascinating glimpse into the potential changes our oceans may undergo as a result of warming seas. As these creatures expand their range northward, we can expect to see more of them in UK waters.
This story highlights the importance of marine conservation and the need to protect and understand the diverse creatures that call our oceans home. It also reminds us of the mysteries that still lie beneath the waves, waiting to be discovered and appreciated.
