For the chronicles, no, I didn't catch any fish. I believe the E2e is too hard to swallow and is not regarded as edible by the majority of fishes, or any other animal for this matter.
By any mean, I was trying to use a scientific method to apply one atmosphere of positive pressure to the light, which my kitchen sink doesn't allow me to do, being not deep enough. Dropping, in a controlled manner, the light in deep waters is a good recognized method for applying an external pressure to it.
Rivers and pools are suggested, since the salt content of sea water may chemically interact with the light, producing unwanted conseguences.
My E2e is waterproof to 10 meters, at least.
Anthony