While I was checking them, I noticed the hydroids, standing like little fans all around the stalks and the float bladders.
|These are tiny; the bladders measure about 3 mm. lengthwise.|
I took a quick photo, one only because I had to leave. When I looked at it later, I decided to take my time and get a good shot. I went back to the tank, and found bare stalks. The hermits had eaten the hydroids, every single one.
Gotta be quick around here!