https://cord70.github.io/photo/photo/tank/macrognatus/tail-en.html
Tail of a macrognatus
Sometimes you see its tail, sometimes it digs under gravel entirely. In gravel the fish may hide from you when you do something in the tank.
of atail
https://cord70.github.io/photo/photo/tank/macrognatus/hole-en.html
Macrognatus in a hole
A macrognatus hides in a hole under green leaf near the front glass of my aquarium
in ahole