Only one question...
How old is he?
Even if they are the same age, usualy one ages sooner. Maybe has a natural
illness or it may have a parasite in his gills.
There are many natural reasons for that behavior. Keep an eye on him but is
he dies, check his gills, and other organs, this will tell you is the fish
just got old!
iy
"Brandonb" wrote in message
...
Hello,

I came home from work on my lunch break yesterday and thought that I was
missing a clown fish. After putting a bit of dry seaweed in, he came out
from hiding in a far corner under some pieces of live rock. For my clowns,
this is VERY unusual behavior. They usually don't even go down to the rock
level let alone hide stationary under it. When he tried getting some food,
the other two attacked him and he went back into hiding.

These are all Occelaris clowns, tank bred. Normally very gentle and have
been together in an extremely close-knit group for months without
incident. I'm at work right now, otherwise I could look at my logs and
tell you the exact date they were added.

Anyway, I moved him to my pseudo-quarantine tank that basically just
houses my small pyjama cardinal and two small cleaner snails to keep it
going. After a lot of observation of him while not being attacked, I can
find no spots or anything that might indicate disease, he swims normally,
and just seems perfectly normal. He does have a nipped side fin since
being attacked that wasn't there previously. On an amusing note, because
of that he looks even more like Nemo. Same side even.

So far I'm keeping him isolated and keeping a watch on any new
developments and will probably keep him in there until his fin regrows at
the very least. Any ideas as to what would have caused the other two to
suddenly attack?

Thanks,

Brandonb