Synodontis  Nigriventris

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Synodontis nigriventris, the blotched upside-down catfish, is a species of upside-down catfish native to the Congo Basin of Cameroon, the Democratic Republic of the Congo and the Republic of the Congo. Blotched upside-down catfish are small, reaching a maximum of 9.6 centimetres .Like other members of the family Mochikidae, they have large eyes, a large dorsal fin and three pair of barbels. These fish are adapted to spend most of their time upside-down. This is reflected in the fish's pigmentation – their bellies are darker than their backs, a form of countershading.These fish have lighter colors on the top of their bodies and darker colors below used for camouflage. The lighter colors on the top of them make it harder for predators to see the fish when looking up toward the sky but only when the fish are swimming upside-down