Goodeids fall into two subfamilies. Empetrichthyidae which comprises of two genera of egglaying fishes from Nevada, and Goodeinae which comprises of an estimated 45 livebearing species mainly from central Mexico.
The Goodied Working Group website is an excellent place to search for more detailed descriptions of all Goodeid species and any related information from taxonomy and phylogeny to current conservation status and threats you may be looking for. Please click on the ABOUT GOODEIDS to go to this section of the website.
The Goodeid working group has excellent information on these species and clicking on the subfamily will take through to the specific page, from there you can select your species and be redirected to the GWG webpage.