Hi Dave: Thanks for finding out what the critters in the water were. So, do killifish fry eat ciliates or Spirostomum? I found this website, but couldn't look at the Spirostomum videos. Maybe you will have better luck. http://micro.magnet.fsu.edu/moviegallery/pondscum/protozoa/spirostomum/index.html Happy Holidays! Susan Welenofsky --- StripMime Report -- processed MIME parts --- multipart/alternative text/plain (text body -- kept) text/html --- ------------------ To unsubscribe from this list, please send mail to majordomo@thekrib.com with "Unsubscribe gsas-member" in the body of the message. Archives of this list can be found at http://lists.thekrib.com/gsas-member/