Scissortail sergeant
The scissortail sergeant or striptailed damselfish (Abudefduf sexfasciatus) is a large damselfish. It earns its name from the black-striped tail and sides, which are remind people of the insignia of a military Sergeant, being similar to those of the sergeant major damselfish. It grows to a length of about . Scissortail sergeants live on coral reefs at depths of up to  in tropical reaches, often living in a group surrounding a single head of coral. They are found on reefs in the Indo-Pacific region, including the Red Sea. This fish is popular in the aquarium trade. It is very aggressive and difficult to stay peaceful with other similar size fishes.