The bluebanded goby (Lythrypnus dalli) is certainly not the most photographed fish in the eastern pacific. Most people go there for big pelagics. Anyways, though very small, these gobies play a very important role in the exchange of nutrients around the rocky reefs of Cedros. Also, they can change their sex within a couple of days to make it easier to reproduce. This and the fact that they constantly hide between sea urchins make them the least vulnerable species of the region.