Thank you John Malone and Dr. George B. Brooks, Jr. for your persistent help with this.
You are correct. It is Midge AKA Chironomus riparius not Camallanus!
I think the tell tale features are the body segments and the narrow pointy tail.
These worms are really small. I had to take about 20 pictures to get
just a couple that were any good. These worms are so hard to see I had
to wait until I could use full sunlight.
This is focused
through the extra high magnification spot of a magnify glass. My camera
is set at maximum zoom and I still had to make it bigger with the
I still moved the fish from the fish tank over to
the raft tank. I looked carefully to sex the fish, and looked for
protruding camallanus. None were found. I was not very
successful at determining the sex as they all seemed to have two holes.
Maybe it's determined by how close together those holes are.
In any case I'm very happy to have them in a tank where I can view
them. I plan to rebuild my 800 gallon tank to a depth of only 18" with
an extra 8" to the top edge of the tank. That will make a 340 gallon
Two of the largest fish or maybe one really stupid
fish jumped out today. Dang that must have hurt because it's 4' to the
floor. Is there a rule of thumb about how high the sides must be?
After reading about Midge I became absolutely certain because
my grow room has been filled with what I thought were mosquitoes.
Hundreds of them; I thought it strange that I never got bit. They do
not fly away when I place my finger on them, so I have been feeding them
to the fish one at a time.
Thanks again for your help!