Another "what is this" thread

[Jimmer12]

So I found a few more critters in my first tank. The first one looks like black antennae sticking out of the rock. Maybe bristle worm or brittle star?

Second one looks like an orange slug. Very small crawling on my glass. Found 2 more on my live rock as well.

 

[Jimmer12]

Here is another one on my rock.

 

[Kentech5]

Second one kinda looks like a flatworm to me but its hard to see


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[Jimmer12]

Second one kinda looks like a flatworm to me but its hard to see


Sent from my iPhone using Tapatalk

Yah I'm having trouble getting a better picture. Do flatworms have "heads"? This thing has a very definite head with 2 antenna, and a slender section at the back that looks like a tail.

 

[jminick2]

brittle star and Prolly some type of nudi if it looks like slug Hard to tell tho

Yah I'm having trouble getting a better picture. Do flatworms have "heads"? This thing has a very definite head with 2 antenna, and a slender section at the back that looks like a tail.

 

[SeattleReefer]

I think the question you should be asking is not 'what is this?' but rather 'should I keep this in my tank?'

I had a bristleworm in my tank that grew from 1" to over 6" in length in only a few months. I did some research on it and got mixed reviews, with some people saying that bristleworms were ok and others saying they are not ok. Finally I asked the lfs about it and they said 'why take the chance?'

That sounded like good advice to me so I captured and flushed the bristleworm down the toilet.

I think that's probably good advice for that orange slug thing. At best it is a harmless detritus eater but at worst it might be harmful to fish or coral. Why take the chance?

 

[jminick2]

I think the question you should be asking is not 'what is this?' but rather 'should I keep this in my tank?'

I had a bristleworm in my tank that grew from 1" to over 6" in length in only a few months. I did some research on it and got mixed reviews, with some people saying that bristleworms were ok and others saying they are not ok. Finally I asked the lfs about it and they said 'why take the chance?'

That sounded like good advice to me so I captured and flushed the bristleworm down the toilet.

I think that's probably good advice for that orange slug thing. At best it is a harmless detritus eater but at worst it might be harmful to fish or coral. Why take the chance?

Because if its beneficial then well its beneficial.... and why take somethings life for no reason and bad information?

 

[Jimmer12]

I got a side view of it. You can see it has a hump back.

 

[jminick2]

I got a side view of it. You can see it has a hump back.

http://www.lionfishlair.com/hitchhiker/vayssiera.shtml

 

[IdahoCindy]

The first picture looks like 2 legs of a brittle star. Good guy.

 

[Jimmer12]

http://www.lionfishlair.com/hitchhiker/vayssiera.shtml

That looks about right. General consensus seems to be that they are ok.

 

[Sk8r]

The antennaed near-snail is a stomatella, good guy. Most ruffly slugs are not good, and should at least go to your sump. Bristleworms are definitely good. Some grow larger than others, some 6", some 12". Either type is fine by me. I like the long pale ones: they stick to 'their' rock and come out only enough to grab spare food.