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

[Shawn O]

Check this out.

http://reefkeeping.com/issues/2003-05/rs/

These kind of sound like Hydroids. The link below has some pictures for comparison, but at the top of the page you'll see some other options as well. Just as an example, Hydrozoan ID 1, Hydrozoan ID 2 etc.

http://www.wetwebmedia.com/hyzoidf3.htm

Thanks, cloak. That's what I figured they were. They're all pretty small and don't seem to bother anything so I guess they can stay until they do.

 

[Netta]

Hi,
Wondering what kind of crab this is. There are two and they came in on the black sun coral I just got. I couldnt get them off the coral because of the creep factor so they are in my tank. They have never left the coral. I know the coral looks pathetic but with feeding in pretty sure. It'll make a comeback.

<a href="http://s425.photobucket.com/user/jelandusn/media/Mobile%20Uploads/20150606_171902_zpsuzrnjjvh.jpg.html" target="_blank"><img src="http://i425.photobucket.com/albums/pp331/jelandusn/Mobile%20Uploads/20150606_171902_zpsuzrnjjvh.jpg" border="0" alt=" photo 20150606_171902_zpsuzrnjjvh.jpg"/></a><a href="http://s425.photobucket.com/user/jelandusn/media/Mobile%20Uploads/20150606_171954_zps8ey3bcl3.jpg.html" target="_blank"><img src="http://i425.photobucket.com/albums/pp331/jelandusn/Mobile%20Uploads/20150606_171954_zps8ey3bcl3.jpg" border="0" alt=" photo 20150606_171954_zps8ey3bcl3.jpg"/></a>

 

[Shawn O]

Looks like an acro crab (Trapezia Pocillopora)

 

[murdock84]

Agree on the crabs.

 

[platypusklr]

Definitely an acro-crab. Had one of these on a branch of tonga i got a coup years ago.

 

[platypusklr]

Lambrose 1994
That is some kind of green algae. Your turbos may not go for it if it is going sexual or the substrate is to sharp

 

[platypusklr]

See my below note. Im new to this forum format

 

[LAMBrose1994]

See my below note. Im new to this forum format

Thank You

 

[Ixion]

Hi, i read the startingpost stating all crabs are bad and should be removed. But on a scale of 1-10 how bad is the crab on the picture? 1 being pretty harmless, 10 being a sure way to destroy my tank.

 

[alexander_ktn]

Hi, i read the startingpost stating all crabs are bad and should be removed. But on a scale of 1-10 how bad is the crab on the picture? 1 being pretty harmless, 10 being a sure way to destroy my tank.

Seems to be an Actaeodes tomentosus - primarily an algae eater but if it can get easy meaty food it won't ignore it. One would need better pictures to be sure, but provided it is one, I'd give it a 3-4, so fairly safe to leave in the tank.

 

[Ixion]

Hi alexander,

Thanks for your quick response. I looked up some pictures and I'm 99% sure this is the same crab. I will see if I can get a better picture from the one in my tank but he really likes dark places

 

[ZeeSparrow]

What is this? Came off during dip in CoralRX of favia frag.

Asterina Star?

 

[Sugar Magnolia]

Yes, asterina star.

 

[holyherps]

ID on this is it bad just got it on some live rock.

 

[taricha]

Yes, asterina star.

I have nothing definitive, but if the pic color is accurate, I'd be more concerned with a red asterina than the mostly white ones.
Many people don't even trust the white ones.

 

[ZeeSparrow]

Thanks. It was a white one but I don't want to take a chance. It's gone, just in case.

 

[xjy3838]

What do these legs belong to?

 

[Martini5788]

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

Brittle star? Try putting a small piece of raw shrimp in front with tongs and see if it comes out

 

[anthonys51]

Found this today looks like a snail but just a half shell

 

[murdock84]

Looks like a Stomatella snail.