Mudskippers

Today I observed a pair of mudskippers below my balcony around rocks on the sand at low tide. I will attempt to identify the species, they were about 5cm, fast, at first I thought they were lizards.
They are probably the Blue Mudhopper, Scartelaos Histophorus.
http://www.fishbase.org/summary/SpeciesSummary.php?id=7487

There are mangroves across the river.