Plecodus paradoxus
Plecodus paradoxus is a species of cichlid endemic to Lake Tanganyika. This fish is a scale-eater, gathering in large schools exceeding 500 individuals and eating the scales of other fish. This species can reach a length of  TL. References

Plecodus
Taxa named by George Albert Boulenger
Fish described in 1898
Taxonomy articles created by Polbot