Meet the Australian trumpet — the world’s largest snail

A snail crawls on a green, moss-covered branch.
The world of mollusks is full of surprising extremes: from the tiny micro-mollusk Angustopila dominikae, which can fit through the eye of a needle, to the Australian trumpet snail, which can reach lengths of up to 91 centimeters. What is this giant snail like? Meet the Australian trumpet snail (Syrinx aruanus), the largest snail in the world and the biggest gastropod. In size, it can be compared to a border collie. This snail has a reputation as a voracious marine predator that hunts along the ocean floor, as reported by IFLScience.

But it’s not just the length of the Syrinx aruanus that is impressive; its weight is around 18 kilograms. Lifting such a giant is like hoisting a hefty car tire. In addition to its strikingly shaped shell, the snail has a vivid yellow foot. A real beauty, to say the least. This mollusk feeds on large polychaetes—segmented worms such as Polyodontes, Loimia, and Diopatra.

In 2000, researchers observed Australian trumpet snails hunting and feeding in the muddy, sandy shallows of Whitnell Bay in Western Australia. Researchers found that the Syrinx aruanus skillfully extracted polychaetes from tubes that sometimes reached lengths of 57 centimeters. It’s no wonder it’s called a trumpet snail!

Empty shells from these giants are popular with collectors. In the past, people used them to carry water and even as wind instruments. Even today, these rare trumpets can occasionally be seen and heard at symphonic concerts.