Forcipiger flavissimus

The next position on the list of the most beautiful saltwater fish is the Forcipiger flavissimus, often known as the yellow longnose butterflyfish or forceps butterflyfish, which is a type of marine fish in the Chaetodontidae family. From the eastern coast of Africa to Hawaii, including the Red Sea, the yellow longnose butterflyfish is common in the tropical waters of the Indo-Pacific region. It is also found in the eastern Pacific Ocean from Baja California to the Revillagigedo Islands and the Galapagos.

The body of the Longnose Butterflyfish is yellow. Its head's color is split horizontally. Blackness covers the top of the head, from the very top of the mouth to the top of the head. The bottom is white. Long and jagged dorsal spines are present. Although it is a medium-sized fish in the home aquarium, the butterflyfish is a rather large fish in the wild.

Yellow longnose butterflyfish are territorial, and they patrol their coral patches with a monogamous mate. However, there have been reports of overt hostility in F. flavissimus between territory owners and those of the same sex. Although it doesn't happen often, when it does, males and females both chase other males. Males guard territory containing a female from other males, whereas females defend food sources from other females.