knorsk

I have a niger triggerfish that changes to a pale color sometimes when he is fed or when he is pissed off and moving rocks around. Does anyone know why some fish do this. Another fish that does this is my friends sailfin tang.

__________________
Household tanks
blue damsel, 2 lawnmower blennies, coral beauty, niger trigger, 2 percula clowns, koran angelfish, gold banded maroon clown, sailfin tang, 4 cleaner shrimp, 5 peppermint shrimp, long spined urchin, short spined urchin, sea cucumber, sally lightfoot, 20 snails, 10 hermit crabs, purple haitian anemone, pencil urchin, snowflake eel, green urchin, six line wrasse, yellow clown goby

Judge

Hi there Knorsk. Boy howdy a pic of this guy/gal would be great in the photo contest.

As to your question, the pale color is usually stress related and I expect will return to normal. I did not see mention of how big your tank is but sounds like you have a great selection of fish.
As far as moving rocks around, from what I understand about triggers, they are not mad, they like to move stuff around. It's just a normal part of their endearing nature. I have read that care must be taken, especially when they get big, to aquascape safely!

__________________
55g SW
Marineland Magnum 350, #3 Koralia, #4 Koralia, Aqua C remora, Odyssea 260W/12K/8 lunar.
40 lbs. CC/65 lbs.LR/40 lbs. LS
5 Blue Green Chromis, Lawnmower Blenny, Serpent Star, Hairy shroom, Red Shrooms, Purple Shrooms, Orange Ricordea, Neon Green Ricordea, Frogspawn, Dragon Eyes, 2 peppermint shrimp, 6 Pin Cushion Urchins, 1 Pulsing Xenia, Green Star Polyps, Mexican Turbos.
75g FW

http://www.aquarank.com/in.php?id=FTF1
http://webfish.top-site-list.com/vote68.html

unclejed

I had a Niger (Mr. Plum) for 7 years. It is normal. Yes, it can be from stress but also excitement (feeding time) and sleep and stress of the sort that moving things around is like work! I would play with mine and move one of his favorite pieces of rock and he would "fade" on his nose and top of his head when he would put the rock back where he had it. So, it's normal. By the way, he loved to eat beef heart.

__________________
"Few people are capable of expressing with equanimity opinions which differ from the prejudices of their social environment. Most people are even incapable of forming such opinions."
Albert Einstein

Dr.Fragenstein

Most fish will change color either at night or when stressed.
BTW unclejed beef heart is not a nutrienally compelete food, leads to fatty liver disease and its typically frowned upon esp. for marine fish as marine fish need slightly different amino acids, thats why most f/w and s/w are usually NOT intermixed. I would try silversides.

Just my two cents

Good luck

unclejed

He loved the beef heart, great source of iron and minerals.

__________________
"Few people are capable of expressing with equanimity opinions which differ from the prejudices of their social environment. Most people are even incapable of forming such opinions."
Albert Einstein

Dr.Fragenstein

Yeah, but think about this, most people love McDonalds!
Without thread jacking I would urge anyone to avoid beefheart or limit its use to maybe 2x a week tops