Ponthoi Pygmy Seahorse
One of 3 species of pygmy seahorse currently known from Indonesia, the Pontohi is so new to science that it hasn't even been given a proper species name yet. These little guys, as their name implies, are less than the size of half your fingernail. They come in a variety of colors from yellow and white to brown and red. They are normally very well hidden, tucked in tight to algae and coral along reef walls.
Lembeh Strait, North Sulawesi, Indonesia