Cybister brevis

imago
Cybister brevis
Cybister brevis

These kuro means black and are the species of Cybister which I caught first by myself. I distinctly remember at that time even now. It's a sort of so sweet memory to me.
They may be quiet apparently, but these ways to swim and colors are dignified as I think. The lengths are 20-25mm.

larva
Cybister brevis
Cybister brevis
pupa
Cybister brevis
Cybister brevis