I've got a canary blenny. It was captive bred by ProAquatix. It's a very cool fish. He spends his day hunting for pods around the live rock. In quarantine, he ate cyclopeeze, but once I put him in the main tank with all the live rock and critters, he no longer was interested in frozen foods. He stays pretty fat on pods. He's very peaceful -- completely indifferent to other fish, and the other fish are indifferent to him. I've heard that wild caught specimens fare less well in captivity. The most common complaint is that they never eat. I think it's a good idea to only introduce these fish to an established tank with a lot of live rock. Also, you should only keep them singly. I started with a pair (siblings), but they began fighting intensely, and I gave one away. They generally don't tolerate other fang blennies in the same tank.