Pix & ID: Critters that come in your rocks: the good and the bad.

[Fredro84]

Hello, I am new to the hobby and I am still learning a lot. I bought a biocube 29 off craigslist and the dude gave me a bunch of live rock and sand with it. The problem is, with it came a lot of hitchhikers. I have a ton of vermetid snails, bristle worms, and he did tell me he had aptasia at one point. Anyways, I need help ID this slime. I want to say it's cyanobacteria, but eveytime I google image it, it doesn't look like red slime to me. Also, from what I've seen in pictures, cyanobacteria is mainly in the sand. I don't have this slime in my sand.

[Pandagobyguy]

So something came out of my live rock when i was feeding today....
It seemed to attack my mini bristle when it came out of its hole. It grabbed one the legs of the bristle and seemed to just bite it off.
Is this possibly a baby mantis or something?



Also something random ive tried feeding this zooa for three months and today it randomly bite off more than it can chew....



P.s. sorry for the dirty glass... i didnt want to scare anything.... if i need a better pic i can

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[ssobel80]

This guy has been growing for a few months now. I believe there are two of them.


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[Pandagobyguy]

Asterinia star i believe^

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[Fredro84]

Please help ID. I'm thinking cyanobacteria but I'm unsure. It's in my rock, none in my sand.

[Dubbletoke]

hey guys, my wife and I just found a strange worm critter in our tank and have never seen one like it before and I can't find anything even close to it in ANY of the ID threads on multiple sites.



Does anyone have a clue as to what this is?

[Dubbletoke]

Sorry for the double post but I wasn't able to edit or delete my previous post:

Here is the proper sized image:



Have no clue what it is

[gregrocks79]

Anyone know what these are? Found a couple around the tank and can't ID them online




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[Hatonhed]

I got my live rock and now a couple months later these things that were kind of gray spirals have turned maroon. Any idea what they are?

[AlSimmons]

Vermetid snails.

http://www.reefkeeping.com/issues/2005-01/rs/index.php

[Shawn O]

I just happened to be up in the middle of the night and shined the light from my phone in the tank and saw this critter. The dark part was sticking up out of the sand a good half inch. With the light on, it slowly pulled back into the sand leaving no trace he had been there. I'm assuming spaghetti or Hair worm. Your thoughts?

[AlSimmons]

Terebellid worm I believe. (good)

[Ron Reefman]

Originally Posted by Shawn O

I'm assuming spaghetti or Hair worm. Your thoughts?

Right on the money. I had a few until I got a wrase, in 2 days they were all gone. Now the wrase is gone and I wish I has some spaghetti worms!

[Huzie]

HI guys, found this on my new live rock.. in the tank for around 3 weeks

Any ideas what it is? its only around 10mm across

[Ron Reefman]

Given the fact that it has 'holes' in it and that it appears to be growing in the shade, I'd say it's some kind of sponge. 99% of the time that's a good thing as it's a filter feeder and helps clean the water.

[Huzie]

Originally Posted by Ron Reefman

Given the fact that it has 'holes' in it and that it appears to be growing in the shade, I'd say it's some kind of sponge. 99% of the time that's a good thing as it's a filter feeder and helps clean the water.

Thanks!


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[jfabritz]

Originally Posted by Ron Reefman

Given the fact that it has 'holes' in it and that it appears to be growing in the shade, I'd say it's some kind of sponge. 99% of the time that's a good thing as it's a filter feeder and helps clean the water.

Now you have me curious about the 1% that isn't good.

[Ron Reefman]

Originally Posted by jfabritz

Now you have me curious about the 1% that isn't good.

Sponges come in so many varieties and forms that yes, there are sponges you don't want. Fortunately most don't do well in aquariums, just like most other species of sponges. Some can grow into the space a coral wants and like any battle between inverts, it's impossible to say who will win. Most of the sponges that do well in aquariums tend to be ones that like the dark and grow under rocks and mostly out of our sight. There are a couple of photosynthetic sponges that can do OK in the light and grow. Sponges require very, very small particles of food. Even smaller than what corals will use, so they are very difficult to keep in most reef tanks.

In fact Monday I'm picking up a red/purple branching sponge that a friend picked up off the beach (exposed to the air for who knows how long, likely an hour or so) and it survived. He didn't know not to collect sponges that have been exposed to the air (most are doomed to die over the following days and weeks after exposure). But they have survived and grown in his tank over the past 6 months! On the other hand, I have carefully collected, protected and cared for about 8 or more shallow water, bright sunlight exposed sponges in the Keys and every one has died over a few weeks or a couple of months in my shallow reef tank.

[Huzie]

This fell (or was pulled out) or my rock today.. looks like a shell of some sort. I noticed it in the rock but didn't expect it to jump out!

Any ideas?

[AlSimmons]

It looks like some sort of clam IMO. Whether it's still alive or not it's nothing to worry about.

[Sugar Magnolia]

Yep, likely an ark clam, harmless.

[KeeperAtlantis]

I recently moved a piece of dry rock I had in my tank for 3 months and spotted this guy attached to part of the rock. It doesn't move, but after large water changes and sometimes addition of calcium some stringy (looks like spider-web) comes out the top. Anyone have an idea? Is it harmful? I have soft coral, LPS, and Anemones in the tank. Thx

[AlSimmons]

Vermetid snail.

http://www.reefkeeping.com/issues/2005-01/rs/index.php

[KeeperAtlantis]

Originally Posted by AlSimmons

Vermetid snail.

http://www.reefkeeping.com/issues/2005-01/rs/index.php

Thank you

[Beweav]

Anybody have any idea what this is that is growing on my chalice frag?

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