Dead crabs

[farslayer]

Yesterday my arrow crab died, today my anemone crab keeled over. Both were fine the night before and my water is in great shape. I have five red scarlets, all accounted for, and five emeralds, four accounted for.
I did notice that my arrow crab had lost two legs the day before I found him dead, my anemone crab had lost both of his big claws. My question is could something be attacking my crabs?
I have an atlantic blue tang, a half-black angel, a yellow watchman gobie, a firefish gobie, a percula clown, a red-lipped blennie, a scissortail gobie, five emerald crabs, five scarlet crabs, a pistol shrimp, a zebra (left-handed_ crab and a condy. anemone. Anything in there sound like it could be a culprit?
My water params are:
Ammonia/Nitrite: 0
pH: 8.3
SG: 1.025
Nitrate: 15
Phosphates: .15
Temp: 80

 

[tuningvis]

you sure they weren't just molting?

 

[farslayer]

I can't find them anywhere if they were. Do arrow crabs molt, I thought they just grew? My tank is 46G with only about 40lbs of live rock, so not too many places for an arrow crab to hide.

 

[tuningvis]

i dunno.. which ones do and which ones dont .. but when my emerald's molt they hide cuz they dont like the light

 

[tuningvis]

they seem to find a way.... i hope thats what happen to yours

 

[farslayer]

I'd assume anything is possible, I mean my scarlets are fine, my pistol is great, all of which were in there longer than the anemone. It just upsets me to no end to just have seemingly random deaths. If anyone sees a problem with my tank inhabitants please let me know, I don't seem to have fighting problems and I don't see/hear the signs of mantis shrimp or welk snails or anything.

 

[meadbhb]

Hiya,
Something I think we forget in this trade. We have no idea how old our friends are when we get them. Most of them are wild caught anyway.
Meadbhb

 

[farslayer]

That's a good point, it's the fact that the arrow crab was missing a couple of legs and that the anemone was missing his claws that worries me, it's like something picked them off.

 

[snipe]

Originally posted by Farslayer
I'd assume anything is possible, I mean my scarlets are fine, my pistol is great, all of which were in there longer than the anemone. It just upsets me to no end to just have seemingly random deaths. If anyone sees a problem with my tank inhabitants please let me know, I don't seem to have fighting problems and I don't see/hear the signs of mantis shrimp or welk snails or anything.

I see something wrong the tang it is to big for that tank "unless you are upgrading to a bigger tank later then forget this post" If not it will eventually get to big stress and die to.