Snailfish. Oceanlab, University of Aberdeen​

Not a cichlid, not even a freshwater fish, but noteworthy nonetheless. A previously unknown species of Snailfish was captured on camera at a depth of almost 28,000 feet at the bottom of the Mariana Trench. The camera was part of a study to understand the ecosystems in the deepest parts of the ocean. The video below shows footage of the mysterious fish. Liparidae, commonly known as Snailfish, are composed of hundreds of different species. They all have scaleless, tadpole shaped bodies and not much is known about them. For more information on the discovery, visit