Blue Neon Dwarf Goby (Stiphodon percnopterygionus)
The Blue Neon Dwarf Goby is a rare fish that's native to Japan. The males have bright blue neon accents.
Smallest fish in the world: Midget dwarf goby
The Midget dwarf goby is one of the smallest fish in the world, reaching a length of .39 inches.
CC BY 3.0, https://commons.wikimedia.org/w/index.php?curid=174207
The Dwarf pygmy goby has a transparent body with a slightly orangish tinge.
The Mottled Shrimp-goby is white with orange spots that are outlined in brown. They have a symbiotic relationship with alpheid shrimp, nearly blind shrimp that dig dens that they share with the gobys.
There are invasive colonies of round gobies in America's Great Lakes.