Just 50 meters from the shoreline at Velilla Beach in Almuñécar, Granada, a striking pinkish, iridescent mass, around 60 centimeters long and 20 centimeters in diameter, was found floating in the water. Swimmers and scientists quickly took notice, raising questions about its origin and purpose.
Marine biologist Luis Sánchez Tocino was among the first to document the find on June 9. Close examination identified the structure as an egg capsule of the diamond squid, known scientifically as Thysanoteuthis rhombus. The species is rarely seen so close to shore, making the discovery impressive for researchers.
Unusual Reproductive Strategy
Many cephalopods attach their eggs to rocks or seaweed. The diamond squid, by contrast, releases them in large, free-floating gelatinous masses. These cylindrical capsules can contain up to 70,000 embryos, protected by the jelly-like structure as they develop. Ocean currents carry the mass near the surface, where it provides shelter until the eggs hatch.
Finding such a reproductive mass so close to a popular swimming area is highly unusual. Diamond squid typically inhabit open waters in tropical and subtropical regions, rarely approaching continental shelves or beaches. Their reproductive behavior and preference for deeper waters make sightings like this exceptional along the Spanish coast.
Scientific Context and Rarity
Records of diamond squid egg masses in the western Mediterranean and Canary Islands are scarce. A study published in the Journal of Plankton Research documented only eight observations between 1995 and 2000. All were found floating near the surface and measured from 80 to 130 centimeters long. The Almuñécar specimen was slightly smaller, but its elongated form and gelatinous, pinkish appearance matched the characteristic features. It also contained a dense concentration of eggs.
Experts caution against reading this event as evidence of sudden ecological change or a species invasion. Instead, it offers a rare chance to learn more about the diamond squid’s sporadic presence in the region and study its reproductive habits in situ.
Advice for Beachgoers
Authorities and marine specialists advise anyone who encounters a similar gelatinous mass at sea not to touch it or remove it from the water. Though unfamiliar in appearance, the structure is extremely fragile and critical to the development of thousands of embryos. Disturbing or breaking it can destroy the next generation of this elusive species. Stay back and observe without interference. Notify local experts or lifeguards so they can assess it properly.
About the Diamond Squid
The diamond squid takes its name from its distinctive rhomboid-shaped fins, which cover much of its mantle and give it a unique silhouette. Individuals can reach up to 130 centimeters in mantle length and weigh as much as 30 kilograms. They are smaller than the much larger deep-sea giant squids. Their elusive nature and preference for open waters make direct encounters rare, especially so close to shore.
