Hemiancistrus subviridis

Hemiancistrus subviridis, the green phantom pleco, is a species of armored catfish from the family Loricariidae, commonly found in Venezuela. Within Venezuela, it is native to the Orinoco and Casiquiare drainage basins, where it is usually found among granitic rocks in flowing water. The species reaches 15 cm (5.9 inches) SL.

Hemiancistrus subviridis is one of two species referred to by the L-number L-200. The other is Baryancistrus demantoides, which resembles H. subviridis in appearance, and it is this visual similarity that likely historically caused the two to be thought of as the same species, or at least closely related ones, leading them to share an L-number.