I've been putting nori on a ciip for my blenny, but today decided to try zucchini after reading about it on this site.
Tonight, when all the lights were out, I caught Mercedes (Goby) furiously munching on the zucchini. Gobies are, after all, both herbivores and carnivores. Since she won't eat the mysis shrimp or flakes, this is better than nothing. I'm going to buy some Selcon and soak the zucchini and mysis in the Selcon before feeding.
Will pursue the clam shell idea as well. Problem is that quantities of food are so small that the mysis shrimp floats away...
I'm also going to try some lettuce to see if she'll eat that!