What killed my chromis?

ZenGuitarGuy

New member
Hello...my chromis died tonight. Yesterday he was fine, no problems, swimming, eating, etc. Everyone else in the tank is good. This morning, I noticed he was in hiding, up behind my intake tube for my hang-on skimmer. I looked closely at him, and noticed he had a round mark on one side. He was clearly distressed, but did eat. He stayed in hiding most of the day.

This evening, I noticed he was unable to swim against the current. I removed him and put him in QT but clearly he was doing poorly. He was trying to swim but couldn't. He passed very quickly after that. I noticed the round mark was actually a wound, and a small wound on the other side of him.

Here's another thing: I lost my yellow watchman goby last week as well, and he had a red circular mark on him as well! It wasn't a lesion so much as a bruise or blemish. I've had him since December of last year. He was fine, in his usual burrow under a rock, handing around the entrance with his pistol shrimp, and then all of a sudden I noticed he was swimming around erratically into areas of the tank he NEVER went into. I didn't suspect injury or anything like that, but he was dead by night's end.

I've attached photos below. Is this a tell-tale sign of anything specific?? I don't really suspect disease, but I'm not an expert.

I'm wondering if it's the pistol shrimp. I don't want to assume without knowing more, but that's two fish dead in a similar way.

Tank inhabitants:

PJ Cardinal
Sleeper Goby
Another Chromis
Tiger Pistol Shrimp
Porcelain Crab
Pom Pom Crab (haven't seen it since added a couple of weeks ago)
Hermit crabs of various sorts (small)
Snails: trochus, bumblebee, nassarius.

Water params are as always:
Temp 78F, SG 1.025, Ammonia 0, Nitrates >10ppm

65 Gallon FOWLR with inverts, no sump.

If there is any other information that would help, please ask. I hope these photos are helpful.

IMG_0289.jpg

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Uronema marinum, most likely. It's a parasite, pretty common in Chromis in particular. I'd post this in the Disease Treatment forum for more qualified responses.
 
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