About three months ago I noticed that my Kuhli loach had disappeared. He does usually hide under the gravel and between plants, but he had seriously vanished into thin water! About five weeks later I needed to change my filter media, and guess who I found, ALIVE! I don't know what he was feeding on, he usaully eats the snails I breed. He had actually grown, a whole 3 cm! I don't know how he did it, he must be a natural survivor. He has been alive for a LONG time now, and survived where other fish have not.