Sudden Death - Copperbanded Butterfly

Ebn

Member
I just lost one of my favorite fish and trying to figure out what happened to it.

First a bit of background. Fish has been in the tank for 3 months now. It was originally acquired from someone else who had it in a FOWLR tank for approximately 5 months and was around 2.5-3". At the time that he had it he fed it chopped clams and shrimp from a modified plastic canister (drilled with holes for the fish's mouth to fit through). I picked up the fish in January and he's been in my SPS dominated tank since then.

While in my care, he's been given a large variety of frozen food pretty much exclusively and fed extremely often (6-8x) since I also keep anthias. The tank also gets pellets (Otohime S1/S2) fed via an Apex AFS during the weekends when I'm out of the office (tank is at the office). Today's feeding included: v20 mini mysis, v20 reef caviar, PE calanus, and PE mysis. The other frozen items that I also feed are: LRS nano, LRS fish eggs, v20 oyster eggs, and ON silversides once a week for the golden dwarf moray. His favorite is PE mysis and he eats 6-8 of them each feeding.

He ate per usual this morning but stopped during the first meal. He then raised all his fins and started swimming in circles. The circling went on until he hit the surface of the tank and then did a backflip and fully stopped swimming. He was being carried by the water being pushed from one of the vortex, so I quickly turned off both of them and observed him. He fell to the bottom of tank and sat upside down on the sandbed breathing very rapidly. This continued for less than 3 minutes and he passed on from there. The entirety of the event took no more than 5 minutes in total.

What he looked like when I pulled him out with all his fins still erect. He measured ~4" so he's grown a full inch since he's been in the tank.
copper_dead.jpg


Has anyone ever seen this happen before?
 
Sorry for your loss. That was a nice male.

Symptoms and circumstances sounds like sudden fright syndrome (SFS), but that you usually encounter with larva and juvenile fish around the time of metamorphosis. The symptoms and that it started during or soon after a feeding fits.

SFS with juvenile fish is due to a lack of HUFA in the food. I had clownfish die by the hundreds due to this before I figured out what was wrong - that was back in the days before the internet.

http://archive.reefcentral.com/forums/showthread.php?t=380494

Your fish likely died of over-excitement during the feeding.

and it isn't limited to fish:
http://www.livescience.com/52573-can-you-die-of-fright.html
 
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