1. a small, brightly colored tropical marine fish that lives near coral reefs

Examples

• The damselfish darted between the coral branches.
• Bright blue damselfish are common in Caribbean reefs.
• The aquarium featured several species of damselfish.
• Damselfish are known for their territorial behavior.
• Snorkelers often spot damselfish in shallow reef waters.
• The yellow damselfish defended its small territory aggressively.