Should I be worried?

I came home from school today, and for those that do not know I added a Two Spot Bristletooth to my tank today from Liveaquaria, so the lights have been off all day.

Well I turned the lights on tonight to feed the rest of the tank (they are monsters and need to eat daily) and I noticed that my roommates firefish, which he did not ask permission to put in my tank had his tail half eaten, not joking.

I do have a purple lobster in the tank that mostly hides in the rock work the majority of the day, so I was thinking that maybe the firefish swam into the lobsters hole in the rock and being the opportunistic creature that the lobster is, tried to eat the firefish.

Besides the firefish, I have a diamond goby, cleaner wrasse, blue hippo tang, two spot tang, two green chromis, and two oscellaris clowns. The only fish that hide in the holes in the rocks are the cleaner wrasse and the goby (who mostly hides under the rocks). The rest of the fish lodge themselves into the caves and such in the rocks.

Should I be worried that this attack could happen on another fish...one that I actually care about and paid money for? If so, what should I do?

Robert

 

What size is this tank?

 

It could be the purple lobster or even a bristle worm,I would keep an eye out but i wouldn't worry about the tang too much.

 

I think it's a 120

 

lol i doubt a bristle worm could eat a chunk of a fishes tail

 

It is a 120 gallon 5 foot long tank. It also has about 120 lbs live rock and 110 lbs of fiji pink sand for a 2-3 inch sand bed...if that helps.

 

lol a big enough one will eat more than the tail

 

theres no way a bristle worm could really catch a fish to eat it thou it would have to be a dead fish....

plus i actually forgot to mention this, theres no way it was a bristtle worm. they do NOT eat live food, they will only eat something that dead so that takes that out of the picture

 

Lol think what you want kid

 

you should watch the firefish for a while and see if anybody's attacking it or if it's intentionally trying to get it's tail nipped at... sounds crazy, but i had a bicolor that had a torn up fin. though that it was the blue damsel that i added to the tank so i watched the tank for a while. turns out the bicolor was intentionally swimming right in my emerald crab's face so that it would grab the fin. few days later it was foggy eye and then it died a couple weeks later...