Acteon

Acteon is a genus of marine bivalve molluscs belonging to the family Pholadidae. These animals are commonly known as piddocks or rock-boring clams. Acteon species are characterized by their ability to bore into soft rocks, wood, or even other shells, creating a burrow in which they live. Their shells are typically thin and fragile, often with a distinctive sculpturing of concentric growth lines and radial ribs. The siphons ofActeon are long and can be extended out of the burrow to filter food particles from the water and to respire. They are found in marine environments worldwide. Some species are considered pests due to their ability to damage submerged structures. The genus Acteon was first described by Linnaeus in 1758. Fossil records indicate that piddocks have existed for millions of years. Their boring mechanism is thought to involve both mechanical abrasion by their shell valves and possibly a chemical secretion. Reproduction in Acteon is typically sexual, with external fertilization. The larvae are planktonic and drift in the water column before settling and beginning the boring process. Examples of species within the genus include Acteon semisulcatus and Acteon pholadiformis.