Bay scallop (Argopecten irradians) in its aquatic habitatPhoto: Rachael Norris and Marina Freudzon / Mayscallop at en.wikipedia · Image source ·Public domain

Animal profile · Mollusks · Scallop

Bay scallop

Argopecten irradians

Bay scallops are small bivalves that live among shallow-water grasses and algae. They can clap their shells to swim away from danger.

Not a fish · an aquatic neighbor

Water

Saltwater + Brackish

Shallow coastal bays, estuaries, and seagrass beds.

Temperature

Range not established

A dependable species-specific wild temperature range was not found in the selected sources.

Size

Up to about 7.5 cm (3 in) across

About as wide as a small cookie

Lifespan

Usually about 1–2 years in the wild.

Life expectancy varies with place, conditions, and what scientists have been able to observe.

01 · Signature adaptation

What does it do?

Bay scallops rest on or among seagrass and algae. When startled, they rapidly open and close their valves, jetting water to move through the water.

Its superpowerRapid shell-clapping lets them swim in short bursts.

02 · Home coordinates

Where does it live?

From the Gulf of Saint Lawrence and the Atlantic coast of the United States to the Gulf of Mexico.

Regions: Atlantic coast of North America · Gulf of Mexico

03 · The menu

What does it eat?

It draws water through its gills and traps tiny food particles.

Filter feeder: phytoplankton, microalgae, suspended organic particles.

04 · Remember this

Two wow facts

01

Many tiny eyes

A bay scallop has rows of small blue eyes along the edge of its mantle.

Sources [1]

02

A swimming shellfish

Unlike many clams, bay scallops can swim by repeatedly clapping their shells.

Sources [1] [2]