The Rare Dumbo Koi Tanjo Betta Fish gets its name from its large, distinctive pectoral fins that resemble the ears of an elephant. These fins give the fish a unique and striking appearance Our breeder has specially bred this fish with unique color genes that create the same erratically spotted patterns as Japanese koi fish. Adding to its allure. Add Rare Dumbo Koi Tanjo Betta Fish to your aquarium today and experience the beauty of this magnificent creature.