Nodipecten nodosus, or the lion's paw scallop, is a species of bivalve mollusc in the family Pectinidae. It can be found along the Atlantic coast of North America, ranging from Cape Hatteras to the West Indies, including Brazil and Bermuda.

The lion's paw scallop is a species that consists of large scallop shells with ridges and bumps that have a rough texture. The shell is known for its distinct knobs on the ridges. Ranging from red to orange and also purple, the lion's paw scallop ranges in color. The shell's common name is derived from its appearance, the color, and the knobs giving it some visual similarities to the paw of a lion.

As the largest scallop of the Western-Atlantic Ocean, the lion's paw has been commercially fished for human consumption for decades. Indeed, the recent decline of abalone fisheries along with an increase in the shell's value has led to aquaculture specific to the species. Their high growth rate makes them popular; however, not much is known about the requirements to improve farming. Due to their popularity in commercial fishing, the lion's paw scallops native to Brazil face the risk of extinction.

Lion's paw scallops are known to be hermaphroditic, so they have both male and female gonads. In external fertilization, an organism will release both eggs and sperm.

The lion's paw shell is valuable to collectors because of its size, vibrant colors, and extremely distinctive features. Because of its large size and it being more common in deeper, rocky waters, it is very rare to find one intact on sandy beaches.

The lion's paw scallop is an epibenthic bivalve that usually lives on rocks inside of caves or in shaded areas.

Spawning begins when sperm and egg are released into the water column. "D-shaped" veligers begin to form 22-24 hours after being fertilized.

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