I saw one of these guys at my lfs the other day. I thought it was really cool. It was good sized and was $20. it was in fw at the time but i heard they do better in brackish water, but ive also heard they live in all sorts of aquatic environments and arent picky to what sg they live in. i was thinking about getting one for a brackish tank with a violet goby. Is it a good investment, or should i look elsewhere?