The wentletrap is a marine snail named for its resemblance to a spiral staircase.

Nature · Published 3 October 2026 Swipe more like this →

In short: Known as the wentletrap, these marine snails belong to the family Epitoniidae and are celebrated for their intricate, turreted shells. Often white with a porcelain-like finish, these predatory mollusks use specialized biological defenses and hunting tactics to survive in oceans ranging from tropical zones to the frigid Arctic and Antarctic waters.

The name wentletrap originates from the Dutch word wenteltrap, which translates to spiral staircase. These gastropods are characterized by their high, conical shells composed of tightly wound, convex whorls. Most species are small, typically measuring less than 5 cm in length, though the broader family Epitoniidae exhibits a size range between 0.6 and 11.7 cm. Their shells often feature deeply ribbed sculpturing, known as costae, which serve as a structural defense against other predatory snails that might otherwise attempt to bore into them.

As members of the class Gastropoda, wentletraps are specialized predators. They are frequently found on sandy bottoms in close proximity to their primary food sources: sea anemones and corals. Observations indicate that these snails insert their proboscis directly into an anemone to feed. To assist in this process, they can exude a pink or purplish dye from their salivary glands, which is thought to act as an anesthetic on their prey. This unique chemical adaptation is a hallmark of their predatory lifestyle within the marine environment.

The reproductive cycle of the wentletrap involves the female laying egg capsules that are held together by a supple string, from which the young eventually emerge as free-swimming larvae. While their biology remains a subject of ongoing study, they are recognized for their geometric shell architecture, which has made them highly prized by shell collectors. Despite their delicate appearance, these snails are remarkably widespread, inhabiting all of the world's oceans. Their ability to thrive in such diverse habitats highlights the evolutionary success of the gastropod class, which has persisted for over 500 million years.

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