Blennies are small, elongated fish belonging to the family Blenniidae. They are commonly found in shallow coastal waters, often hiding among rocks and coral reefs. Blennies have a distinctive appearance, featuring a flattened body and a large head with prominent eyes. Many species are known for their vibrant colors and patterns. These fish are primarily herbivorous, feeding on algae and small invertebrates. Blennies are also known for their unique behavior, often seen perched on rocks or swimming in a darting manner. They play an important role in their ecosystems by helping to control algae growth and providing food for larger predators.