I googled for amphibian blood clotting but, even better, this link references lamprey (example of fish before jaws evolved) and hagfish, which secrete a gelatinous slime, made of fibrin, in order to repel predators (if it can choke the attacking fish's gills with goo, it may even kill its attacker)
It is a set of slides and I suspect the associated lecture is not provided. Just keep scrolling on and reading the text statements for a few nuggets.
http://www.slideshare.net/mobile/leafwarbler/csu-fresno
There is an, otherwise inexplicable, slide of the cover of Behe's book, near the start. I can't imagine what the lecturer might be saying, at this point!