Bought a beautiful turquoise damsel. I have a 3.5 gal which I wanted only my pigmy goby a other fish and house keepers. I had the goby and assorted shrimp, emerald crab and hermit ruby legs. The tank was well balance d so I introduced the damsel. After a week she disappeared. I moved the rocks - shook out the plastic foliage and nothing. Completely disappeared. Now every thing in that tank has been there for at least three years. That was a month ago, everything else in the tank is fine. Then yesterday morning I caught BRISSLE WORM filing itself into a decrepitly old shell. I pulled the shell from the tank and dropped it into a bowl of tap water, and sure enough the worm crawled out. Mystery solved. Now question, if he was an 1ch long need I look for offspring? I can't even think how long that thing has been in there and I haven't lost the goby or shrimp. any info would be great. Thank you in advance