Masked fish, also known as masked goby or masked blenny, are small marine fish found in tropical and subtropical waters. They are characterized by their distinctive coloration and patterns, which often include a mask-like appearance around their eyes. These fish typically inhabit coral reefs and sandy bottoms, where they can easily blend in with their surroundings. These fish are known for their unique behaviors, such as darting in and out of crevices to avoid predators. They primarily feed on small invertebrates and algae, playing a role in the ecosystem by helping to maintain the health of coral reefs.