Ulva is a genus of green algae commonly found in marine environments. It is often referred to as sea lettuce due to its leafy appearance. These algae thrive in shallow waters and can be found attached to rocks or floating freely. Ulva plays an important role in coastal ecosystems, providing habitat and food for various marine organisms. Additionally, it is known for its high nutritional value and is sometimes used in culinary dishes, particularly in Asian cuisine. Its ability to absorb nutrients makes it beneficial for water quality in coastal areas.