A fascinating video clip of 2 kinds of Sinogastromyzon could be taken, so it's introduced.
Sinogastromyzon puliensis and Sinogastromyzon wui.
http://www.youtube.com/watch?v=9AJrm6M6384
They're waiting bottom sand to be dug by a goldfish up.
And they're eating schizophycean in a gap of the bottom sand and the glass which became bare.
A blood worm is the best treat for them.
Left one is S. puliensis Right one is S. wui.

Upper one is S. puliensis Lower one is S. wui.

Upper one is S. puliensis Lower one is S. wui.

Upper one is S. puliensis Lower one is S. wui.

S. puliensis tries to tear S. wui away.


I don't understand Chinese well,
but a new species of Sinogastromyzon genus seems to have been found in a Chinese Yunnan Ministry.
http://www.youtube.com/watch?v=0RI81Refa_o
Unfortunately, Hillstream loach kinds aren't distributed over Japan for some reason.