Ansorgii Bichir (Polypterus ansorgii)

Ansorgii Bichir (Polypterus ansorgii)Also known as the Guinean bichir is a ray finned fish from rivers and other freshwater habitats in Western Africa, ranging from Guinea Bissau to Nigeria. It reaches a maximum length of 12 inches, is greenish brown to black in color, and has large, dark spots and blotches on its sides.

thus does not exist in the wild

The reedfish

Marbled Sand Goby

It is a long-term commitment requiring space

With age they develop a strong patch of red color on their back just behind the head

Use caution: With similarly shaped fish (may trigger aggression)

Diet:Omnivorous with a heavy lean toward plant-based foods:

well-oxygenated water with plenty of current

is a species of freshwater ray-finned fish

making it truly unlike any other aquarium fish

it is not small by aquarium standards

But here's the major difference