Exploring the Euteleost Tree of Life represents the education and outreach of the Euteleost Tree of Life assembling the tree of life research grant (NSF DEB Grant No. 0732819; PI: Ed Wiley) it includes a curriculum activity and a interactive fish tree. Investigating a Deep Sea Mystery, a curriculum module for high school and undergraduate students follows the research of project collaborator Dave Johnson (Smithsonian Institution) to explore deep sea fish phylogeny. The module includes an investigation of What is a fish?, fish anatomy and morphology, and how different lines of evidence (morphological and molecular) can be used to study evolutionary relationships. A fisheye view of the tree of life is a web module featuring an interactive fish tree of life highlight with a series of mini-stories Web material is still in the early stages of development, and will include a splash page with a simplified clickable fish tree through which the different.