Please note that the content of this book primarily consists of articles available from Wikipedia or other free sources online. Acanthemblemaria hancocki, known commonly as the Hancock's blenny in the United Kingdom, is a species of chaenopsid blenny in the genus Acanthemblemaria. It is found in coral reefs around Costa Rica and Panama, in the eastern central Pacific ocean. It was named by G.S. Myers and E.D. Reid in 1936, and can reach a maximum length of 4.5 centimetres.[2] Blennies in this species feed primarily off of zooplankton. The blennioid family Chaenopsidae includes the pike-blennies, tube-blennies and flagblennies: all perciform marine fish. The family is strictly tropical, ranging from North to South America. There are 14 genera and 90 species represented, the largest being the sarcastic fringehead, Neoclinus blanchardi, at 30 centimetres (12 in) in length; most are much smaller, and the group includes perhaps the smallest of all vertebrates, Acanthemblemaria paula, measuring just 1.3 centimetres (0.51 in) long as an adult.

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