Have you ever seen conjoined twin fish? These conjoined Nile tilapia fish swim in a Bangkok aquarium. They are eight months old and share a part of their stomachs. The bigger fish tends to protect the smaller one from harm, while the smaller one looks for food at the bottom of the aquarium.
Nile tilapia can reach a maximum of two feet in length and can weigh up to nine pounds. Originally from waters stretching from Africa to the Cape Horn, the fish was introduced to freshwater irrigation systems so as to fight algae growth but has now become a pest.