Bichirs

Bichirs are a group of ray-finned fish belonging to the order Polypteriformes. They are ancient fishes, often referred to as "living fossils," as they have changed very little in appearance over millions of years. Bichirs are native to freshwater and brackish habitats in Africa. They are characterized by their elongated bodies, dorsal fins that are divided into multiple small finlets, and a pair of lung-like swim bladders that allow them to breathe air. This air-breathing ability is crucial for their survival in oxygen-poor waters.

There are currently around 16 recognized species of bichir, with the most well-known being the Senegal bichir, sometimes called the "dinosaur eel" due to its appearance. Bichirs are carnivorous and typically feed on smaller fish, invertebrates, and amphibians. They are generally slow-moving predators, often lying in wait for prey. Their pectoral fins are robust and lobed, which they use to "walk" along the substrate or to help maneuver in their environment.

In aquariums, bichirs are popular among advanced hobbyists due to their unique appearance and interesting behaviors. However, they require large tanks with secure lids as they are known escape artists and can also be quite strong. Their diet in captivity usually consists of live or frozen foods. Bichirs are a fascinating lineage, showcasing evolutionary adaptations that have allowed them to thrive for eons.