What is on this bluethroat trigger face?

DerekC

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He was fine this morning. Then suddenly this shows up:

20171220_131520.jpg


Stung by the Brittle starfish? I knew they were fighting for the piece of silverside I dropped in this morning.
Thanks.
 

sfin52

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Brittles starfish don’t sting. I don’t think it was the brittle
 

4FordFamily

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I’ve never seen anything like that...

Any anemones in the tank?
 

reefaland310

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My Hawaiian black trigger would get that. It would disappear by morning. Happened a few times when first introduced.
 

MSB123

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Ive kept a few bluethroats, - ive seen thatonce before when my carpet anenome got him- i managed to pull him out in time :)
 
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DerekC

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There are no anemone in the tank. Could a coral have done this?
 

HB AL

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Looks like something caused it to lose its skin pigment, if it happened quickly then maybe something stung him. I've never seen that on a trigger. Hopefully it goes back to normal.
 

Maritimer

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Could a coral have done this?

Not unlikely ... we often see similar marks (though darker, on a light background, called "hypermelanization") pretty commonly on clownfish that attempt to guest in, for example, frogspawns or hammers.

~Bruce
 
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DerekC

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Ok. I wrote to Bob Fenner (wetwebmedia.com and author of Triggerfishes for Marine Aquariums) and he thought it was "burn" by bristleworms. I have a lot of those and this blue throat is new to the tank (2 - 3 days). I guess it has learned a lesson. This morning the burn seems to fade away.
Thank you guys.
 

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