Google search brought up a link to this blog that makes reference to a preview chapter from A Time For Treason entitled Enterprise Fish. I haven't tracked it down yet - it may not be available yet, actually - but if someone out there does please let me know. The link is below. I will update this entry as time progresses - I will try to get the chapter myself to discuss. Looks great though~! There is a line drawing of an enterprise fish shown at the link.
Thrilling Wonder Stories: The Official Website: Thursday Preview: Enterprise Fish