Photographer Visarute Angkatavanich has taken stunning and beautiful photographs of Siamese fighting fish.
Also known as Betta Splendens, these fish come from Thailand, Cambodia, Vietnam and Laos, and are territorial and aggressive in nature.
The following images feature male fighting fish flaring their fins as they are more colorful than their female counterparts.
View the rest of these lively and dynamic portraits below.
[via This Is Colossal and Visarute Angkatavanich]