DetailsOut Of Stock Amazon Red Tail Tetra (Aphyocharax cf. dentatus) $6.99 A unique and rarely seen characin, the Amazon Red Tail Tetra is a larger growing species found in relatively fast moving waters of the Amazon and its tributaries. In the aquarium, they are fast moving and always in motion, best kept in a school of 5 or more fish. They can be aggressive and nip fins off smaller or slower moving species so tankmates should be chosen carefully – any long-finned species should be avoided. With their size and speed, these tetras make an ideal dither fish for medium sized South American Cichlids.