The best time to add a new fish is before the YT and damsels. ;-)

Better, yet, remove the damels altogether; they'll never give you anything
but grief.

"At the same time I put a tunnel digger goby, 2 days later he was dead with
blood stains on one side (inside), which suggested me he might have eaten
a
crab and got cut inside."

Very much doubt that any goby is going to eat a crab.

What size tank are these fish in? Like everyone else has said, after lights
out (or close to), is best. Moving some of the rock around to de-establish
territory helps.

Good luck - I've torn down a couple reef tanks now to remove the last blue
damsel,or 'peaceful' chromis. Never again.

Teri
http://home.comcast.net/~76fxe



"Wayne Sallee" wrote in message
ink.net...
The best timing is usually turning the lights out, and then adding the
fish.

Wayne Sallee
Wayne's Pets



RubenD wrote on 12/30/2006 8:29 PM:
Everytime I add a new fish to my tank, the other tenants surround it and
show some territorial behavior, especially my dear damsells. This
cause
stress to the new fish. My questions is, if you add the fish with the
lights out, would it make a difference in the morning?

Less traumatic perhaps?

I ask because I added a lawnmower blenny and he got chase even from the
yellow tang, and still being bother by the blue tang and of course my
damsell. By the way, the damsell have a particular behavior when
bullying,
he shake his tail on the face of the other fish, why is that?

At the same time I put a tunnel digger goby, 2 days later he was dead
with
blood stains on one side (inside), which suggested me he might have
eaten a
crab and got cut inside.

I'm planning to add either a tiny yellow goby (I'm still considering due
to
the damsell) or a coral beauty which seems more safe to the coral than
the
butterflies.

Daytime or Nightime, that is the question?

TIA

Ruben