Fellas- The question seems to be "what chemical will penetrate organic membrane and have an affinity for H2O?" WD-40 was specifically designed to disperse water. I would suggest that some industrial chemistry be tried. Surfactants of all sorts are readily available with a myriad of characteristics. The speed at which it goes into solution with water as well as the temp can be controlled. You can also tailor it to disolve only certail oils based on molecular weight. I have access to the two most respected industrial chemists in the puget sound area and would be happy to find the chemistry to do precisely what you need. The only catch is that I need to know exactly what it is you would like to do. If it can be put into words, do it and we can possibly come up with the ultimate fish slayer. (I will work all day around cyanide but not ten minutes around DMSO)