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

[NS Mike D]

Attachment 316978


Is this something I should remove for the tank? It's about 3/4"

[reefan2015]

so last night when I went and looked at tank there was a pink glowing section on some recently (2 weeks ago) installed dead rock. I have LED lighting and it was under the black light setting. So I turned on the full spectrum light to see what it was and it looked clear... almost like little tiny nodes. There is no hair for tentacles coming from it at all. It is important to note that I do have live rocks and sand in the tank as well. It has been up and running now for about 7 weeks. I recently went through an ammonia spike but it appears that I now have cycled completely.

72 gallon
two clown fish
two cleaner shrimp
1 B cardinal fish (second died during spike RIP)
2 turbo snails
1 feather duster
1 blue legged hermit crab
mushrooms
green zoanthids

everything seems very happy, eating well and growing. all are babies

can not see it with a camera so a pic right now is not available.

[anthonys51]

Originally Posted by IDreamOReefin

Pineapple sponge? I have a bunch in my skimmer as well.

yes thanks thats what they are

[reefan2015]

It looks like it is smiling so it must be ok! right?

[Syho]

Lmao it does look like it smiling

[IDreamOReefin]

Originally Posted by NS Mike D

Attachment 316978


Is this something I should remove for the tank? It's about 3/4"

Some kind of nudibranch. Can you get a shot of its back?
Remove if you can, you can always put him back if he's ok.

[NS Mike D]

Originally Posted by Syho

Lmao it does look like it smiling

I guess he heard me asking to say cheese when I snapped the picture

[NS Mike D]

Originally Posted by IDreamOReefin

Some kind of nudibranch. Can you get a shot of its back?
Remove if you can, you can always put him back if he's ok.

I just read they feed on hydroids, which goes along with the little outbreak of them on the glass.

[alexander_ktn]

Originally Posted by NS Mike D

I just read they feed on hydroids, which goes along with the little outbreak of them on the glass.

It's hard to say from the image what species it is - if you can get a view from above it might help.

I'd hazard a guess that it's some Tambja or Thuridilla species - so not something to worry about, but probably not something that will survive more than a few months in the tank, anyway.

[NS Mike D]

Originally Posted by alexander_ktn

It's hard to say from the image what species it is - if you can get a view from above it might help.

I'd hazard a guess that it's some Tambja or Thuridilla species - so not something to worry about, but probably not something that will survive more than a few months in the tank, anyway.

Thank you. Found two more in the refugium this morning. Did a quick look and you are correct. It looks like Thuridilla decorat.

[Lunx20036a]

Hi guy's

Am new to the hobby after I inherited my stepdad tank I managed to start the clean up process after been neglected due to ill health. I have stated to notice some critters starting to come back like feather dusters but also I have found this critter that am not sure on. I was wondering if it's good or bad for my tank

[snoopie702]

Help need ID on this little guy. Came in with shipment of pods I placed online.

Crab is all white/clear with only black on tip of claws.

[Martini5788]

Originally Posted by Lunx20036a

Hi guy's



Am new to the hobby after I inherited my stepdad tank I managed to start the clean up process after been neglected due to ill health. I have stated to notice some critters starting to come back like feather dusters but also I have found this critter that am not sure on. I was wondering if it's good or bad for my tank

Cowrie

[Lunx20036a]

Thanks for the quick reply is it good or bad for the tank

Originally Posted by Martini5788

Cowrie

[Martini5788]

I would post a picture of the back of it, and then wait for someone more experienced as I have never dealt with them before

[Lunx20036a]

Ok thanks here the back

Originally Posted by Martini5788

I would post a picture of the back of it, and then wait for someone more experienced as I have never dealt with them before

[Sugar Magnolia]

Originally Posted by snoopie702

Help need ID on this little guy. Came in with shipment of pods I placed online.

Crab is all white/clear with only black on tip of claws.

Juvenile xanthid crab. They are extremely destructive. If you have a sump toss it in there.

[pagojoe]

Originally Posted by Lunx20036a

Ok thanks here the back

It's a Gold Ringer cowry, Cypraea (Monetaria) annulus. One of the most common cowries in the hobby, and considered by most to be harmless.

[pagojoe]

Originally Posted by NS Mike D

Attachment 316978


Is this something I should remove for the tank? It's about 3/4"

I don't think it's a Thuridilla because it's too "fuzzy" and not elongated enough. It also doesn't seem to have the shape of the Tambja species I know...but a pic from above would help a lot. I'll guess that it turns out to be one of the timid little Elysia species (which are harmless, and closely related to Thuridilla), but it could still be something more sinister. ID's from the bottom are always difficult, and often impossible.

Cheers,



Don

[Heatherabel3]

How big can a copepod get? Most of what I have is still teeny tiny on the glass and looks like little fleas. But I just found some on a rock in the front that are bigger, 1 mmish, in size. From what I can make out they are brownish in color, seem to be a little wider at the head, and they have two little things that poke out of their butt.
I will never be able to get a decent pic on my phone since they are so small, but any ideas if these are still good pods or if they are the bad isopods?

[Rhygar666]

http://i.imgur.com/2GJqzML.jpg
http://i.imgur.com/8qziXRE.jpg

sorry i couldnt upload those pics, failed for me, what is this a worm? its like a snail

[kainic]

Hi,
Can you please tell me what's this?
https://youtu.be/n2QZnppLS4g

It's about 2-3mm long.

Thank you very much
Kainic

[cloak]

Originally Posted by kainic

Hi,
Can you please tell me what's this?
https://youtu.be/n2QZnppLS4g

It's about 2-3mm long.

Thank you very much
Kainic

It looks like a nudibranch of some sort. In most cases these are bad, but I'm not really sure about this one though. Maybe somebody else will chime in.

[alexander_ktn]

Originally Posted by Heatherabel3

How big can a copepod get? Most of what I have is still teeny tiny on the glass and looks like little fleas. But I just found some on a rock in the front that are bigger, 1 mmish, in size. From what I can make out they are brownish in color, seem to be a little wider at the head, and they have two little things that poke out of their butt.
I will never be able to get a decent pic on my phone since they are so small, but any ideas if these are still good pods or if they are the bad isopods?

Might very well be a copepod - some species (like Tigriopus californicus) can be quite large.

Originally Posted by Rhygar666

http://i.imgur.com/2GJqzML.jpg
http://i.imgur.com/8qziXRE.jpg

sorry i couldnt upload those pics, failed for me, what is this a worm? its like a snail

It's a nemertean - mainly predatory worms. Many just feed on small invertebrates but I would remove it, if it was in my tank...

[NS Mike D]

Originally Posted by pagojoe

I don't think it's a Thuridilla because it's too "fuzzy" and not elongated enough. It also doesn't seem to have the shape of the Tambja species I know...but a pic from above would help a lot. I'll guess that it turns out to be one of the timid little Elysia species (which are harmless, and closely related to Thuridilla), but it could still be something more sinister. ID's from the bottom are always difficult, and often impossible.

Cheers,



Don

Attachment 317379

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