Mudskipper
The local "what's here" sign told me the name of the species. I really like the little blue dots. These guys go from the little streams to the larger mud areas and seem to spend a lot of time fighting over territory.
This is a Spiny Dogfish, also called mud shark (to scare children). While we were tied up here it's all the fisherman on board pulled up. You can't even use them for bait - the fish smells badly of amonia.