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

Is it hard or soft? If it's soft I want to say a Majano anemone, but I don't think that's correct. If it's hard maybe a Rock Boring Urchin?

I think it a majano, but it could be an aiptasia, there is no way that is a rock boring urchin IMHO. I see them all the time when I snorkel in the keys. I even kept one for a year or so.
 
I think it a majano, but it could be an aiptasia, there is no way that is a rock boring urchin IMHO. I see them all the time when I snorkel in the keys. I even kept one for a year or so.

Do rock Boring Urchins have spines all over them? I'm not exactly sure if that's what this mystery creature is or not, but it almost looks like 80% of it could be buried in the rock. It's sure got the right color for it. Hmm.

https://www.reefcleaners.org/aquarium-store/rock-boring-urchins
 
Do rock Boring Urchins have spines all over them? I'm not exactly sure if that's what this mystery creature is or not, but it almost looks like 80% of it could be buried in the rock. It's sure got the right color for it. Hmm.

https://www.reefcleaners.org/aquarium-store/rock-boring-urchins

Just to be clear, we are talking about the photos in post #5936, right?

Yes, they have spine all over just like most other urchins. And I've never seen such a small one boring into a rock. And the ones I see in the Florida Keys have black spines and reddish tests. But that doesn't mean ones from other locations might not look different.

But this looks more like a zoa than an urchin to me. Which is why I said majano or aiptasia.
 
Id

Id

Thanks for the responses AlSimmons and Ron Reefman. Creature was out again this morning. Moved entire body out of hole in rock and moved at a decent pace. Possible an urchin, not an anemone. It's moving in the attached pics and has many thin tentacles/appendages radiating from it's core. I haven't seen any urchins with rounded spines, so still curious as to what it is.
 

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Much better pictures and I think Al is right, it is an urchin (BTW, good job Al). There are urchins with rounded off spines and they all have the tentacles with small suction cups at the end so they can hold on to things. You can see them between the spins on this urchin I collected last week.

 
Thanks for the responses AlSimmons and Ron Reefman. Creature was out again this morning. Moved entire body out of hole in rock and moved at a decent pace. Possible an urchin, not an anemone....I haven't seen any urchins with rounded spines, so still curious as to what it is.


When I first got my hitchhiker urchin, he looked like this
4e21056bc5ec01223c079b448179c596.jpg


3 months later
cce40d0b0aa83b1567f962367cc024e4.jpg


And now he's size of a softball. Been this size for over a year I'd say.
 
New to forum and have a possible issue...

New to forum and have a possible issue...

I'm very new here and I'm not sure if I fit in even because I have a freshwater tank not coral but found this site while looking for information on taking care of and maybe breeding shrimp. I just found that one of my ghost shrimp has a worm and I need to isolate it before it kills any of the other shrimp and makes the recent deaths of two of my RCS more suspicious in hindsight. I've taken some pics of a few of the other shrimp as well as the sick shrimp, tho I haven't caught a pic of one RCS and one of the adult ghosts was being annoyingly discreet hiding in the back middle of the tank at the very hardest place to get a decent photograph of it but I tried. If people can comment on shrimp genders that is useful info too, especially for any non ghost since I don't want too much of a population of them...Prefer the colorful and more interesting (rather than creepy lol) looking shrimp.
 
Baby/Shell-less Snail?

Baby/Shell-less Snail?

I just caught this guy on top of my live rock of my DT today. (I know the photo's aren't the greatest, had to do a full zoom to get this close, so it's pretty grainy.)

It's probably about 1/8 inch long (under 4-ish mm).

I thought it was something bad at first, and was going to take it out. However, after looking closer I'm leaning toward it being a baby (or maybe shell-less?) snail. So for the time being I left him in my DT...

...but if anyone sees any signs of this being something bad, let me know.

Thanks
IMG_1144.jpg
IMG_1143.jpg
 
I just caught this guy on top of my live rock of my DT today. (I know the photo's aren't the greatest, had to do a full zoom to get this close, so it's pretty grainy.)

It's probably about 1/8 inch long (under 4-ish mm).

I thought it was something bad at first, and was going to take it out. However, after looking closer I'm leaning toward it being a baby (or maybe shell-less?) snail. So for the time being I left him in my DT...

...but if anyone sees any signs of this being something bad, let me know.

Thanks
View attachment 374722
View attachment 374723
Sump it. It could be a nudi. hard to tell, or maybe spaghetti worm. Any tentacles or other characteristics that might help our than picture.

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Aiptasia?

Aiptasia?

Ok, I'll admit I'm a little spooked about all the aiptasia posts/pages I've read, so this might be a little stupid, but is this pic of an aiptasia? Only seen this one, so I was kind of thinking no, but noticed some weird critters the last couple of days......WTF1.JPG
 
Feather Duster

Feather Duster

I'm actually thinking its a feather duster now. Right? Just not as colorful as a lot of the pics
 
I'm very new here and I'm not sure if I fit in even because I have a freshwater tank not coral but found this site while looking for information on taking care of and maybe breeding shrimp. I just found that one of my ghost shrimp has a worm and I need to isolate it before it kills any of the other shrimp and makes the recent deaths of two of my RCS more suspicious in hindsight. I've taken some pics of a few of the other shrimp as well as the sick shrimp, tho I haven't caught a pic of one RCS and one of the adult ghosts was being annoyingly discreet hiding in the back middle of the tank at the very hardest place to get a decent photograph of it but I tried. If people can comment on shrimp genders that is useful info too, especially for any non ghost since I don't want too much of a population of them...Prefer the colorful and more interesting (rather than creepy lol) looking shrimp.
Please help! I just don't want to sit by and watch the poor thing die! She even molted today or last night and it didn't emerge yet! Any advice or idea (except euthanizing because she doesn't yet seem like she even knows it's in her, although since her molt she's been a bit less active but I think that has to do with unhardened skin) would be helpful! Not sure how to put up the pics I have of her/it...
 
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