I removed one of three from the tank because he had an eye injury and his find were getting nipped at pretty bad. As soon as i took him out i noticed that one of the other ones went inside of a hallowed out head that i use as a cave for my pleco. This was two days ago and i have not noticed him come out of it since then. when i shine a flashlight inside i can see that it is in there floating normal and seems to be healthy, i havent even seen it come out to it. It is only about 3 inches, could it have spawned eggs already?