OK, I just wanted to say that I have two Catalina Gobies and I have had them for about 4 months now, and they are doing very well. I have researched and looked into them. Now here is the common misconception. There are Catalina Gobies that come from the Island of Catalina off of So. California. Those ones are coldwater fish, and are hard to keep in tropical aquariums. Sometimes they will adapt, but usually do not last long. Now, the other type of Catalina Gobies come from the Sea of Cortez between baja california and Mexico. They come from another island in the sea of cortez which is ironically named Catalina Island. There the water is much warmer and can survive in tropical aquariums. I currently have the ones from mexico, they both look the same, but I am sure their are minor differences.