Chaenopsis deltarrhis, the Delta pikeblenny, is a species of chaenopsid blenny found from Costa Rica to Colombia, in the eastern central Pacific ocean. It can reach a maximum length of TL. This species feeds primarily on zooplankton.
References Böhlke, J. E. 1957 (26 July) A review of the blenny genus Chaenopsis, and the description of a related new genus from the Bahamas. Proceedings of the Academy of Natural Sciences of Philadelphia v. 109: 81–103, Pls. 5–6.