Help! Two days after got my little guy.... Not sure what this is?

[clpotter72]

White spot on back. No little ich spots or nothing wrong with gills or fins. No sure if just a scrape. Have two emerald crabs, two skunk cleaners, watchman, and two damsels.

 

[grant778]

I don't know what it is. Just monitor it for now I guess. Sometimes fish have natural defects in them. It may be something or it may just be the way the fish is.

 

[spanko]

Looks like some type of damage. Maybe some agression from the damsels.

 

[saban2013]

It does appear to be aggression. What type of damsels do you have? Also, what is your tank size? I have also seen this occur not from other fish, but from the fish itself darting around rock while evading more aggressive fish types.

 

[clpotter72]

Thanks guys. That makes me feel a little better. I have two yellow belly damsels that are only about 1.5-2.0 inches long. I haven't seen any sign of aggression other than my cleaner shrimp trying to get a hold of everything that passes by. My tank is a 38 gallon.

 

[clpotter72]

 

[clpotter72]

That's one of my damsels

 

[clpotter72]

Here is another question.....what is this thing and is it bad? Just a starter aquarist so I feel kind of stupid asking this stuff but this hobby is spendy so I am trying to avert catastrophes!

 

[jay0705]

Its hard to tell in your pic. There is a ton of stuff you can get on live rock. Most is fine sum is not. Apatasia being the not. Lol but it doesn't look like that's what u have.

 

[spanko]

Is it motile? (does it move)
Looks like a sponge but would need a better picture.

 

[clpotter72]

Yeah.....it moves. It has little antennas and little legs with a clear kind of shell shaped like half of a sunflower seed. It has like a cotton like trailer that sticks out about 1/2 inch

 

[spanko]

Will certainly need a better picture to be sure but could be a Nudibranch or a Stomatella snail.
Here is an example of a white nudibranch

Here is an example of a stomatella

 

[clpotter72]

It definitely looks more like the stomatella. Are they harmful to anything?

 

[spanko]

Stomatella = good - excellant - great hitch hiker!!