Dictionary of Ichthyology
Brian W. Coad and Don E. McAllister†
The Dictionary of Ichthyology is now available at the Gutenberg Press
(http://gutenberg.cc/eBooks/WPLBN0100750819-Dictionary%20of%20Ichthyology.aspx
or http://worldlibrary.org/eBooks/WPLBN0100750819-Dictionary%20of%20Ichthyology.aspx)
and will no longer be updated. It is 3309 pages long and so takes some time to load. There are over 27,190 terms defined and over 2360 illustrations.
www.briancoad.com