The Mysterious Arrival of Adelomelon brasiliana Snail Eggs on Mar del Plata Beach

The beaches of Buenos Aires Mar del Plata were recently covered in a peculiar sight: thousands of snail eggs scattered across the sand. Upon closer inspection, it was revealed that these eggs came from the Adelomelon brasiliana, a carnivorous snail species found in the waters off the coast of Southern Brazil, Uruguay, and Argentina.

These giant sea snails can grow up to eight inches long and are known for their unique egg capsules, which are rigid and filled with a clear fluid that nourishes the developing young. The egg capsules themselves are actually made up of two distinct layers, each serving a different purpose in protecting the developing snails inside.