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

[alexander_ktn]

To me it really seems like something in the family Thalassianthidae - even more with the new pictures...

 

[alexander_ktn]

Tamarae,

I can't make out much on the first pic - not even enough for a guess...

On the second pic I see some red algae - they don't usually grow into pests and can add some color to a tank - so don't worry. The description of the stalk with hairy things could be a lot of things, And the description is all I can go with, since I don't see much: feather dusters, hydroids, some algae species, foraminiferans etc...

 

[Tamarae]

Thanks Alex

The new lights are installed and ill work on my photography skills. Good excuse for that macro lens I've been wanting. Teehee

 

[killinit123]

so are amphipods good or bad? because I have what seems to be millions of them in my fuge!! and are they something my dragonette will eat?

 

[alexander_ktn]

so are amphipods good or bad?

Good.

because I have what seems to be millions of them in my fuge!!

Good!

and are they something my dragonette will eat?

Probably - if they are small enough and slow enough to get caught. Most fish will eat them if they get them.

 

[chrissfoot]

Another hitchiker

Another hitchiker

Yet another hitchiker on my new rock. This one is a bit odd, not like anything i've ever seen. It's like a really flat woodlouse. It hides in a hole during the day then slowly crawls over the rocks at night. I thought it was just part of the rock at first till I looked later and it was in a different place! I've added a zoomed in photo and a bigger one for an idea of scale

 

[alexander_ktn]

It's a chiton, a type of snail - an algae eater.

 

[Fishyoga]

Mystery Critter

Mystery Critter

I have had this thing since I set up my 10gal tank. It is smaller than the diameter of a fingernail. It didn't match any Aiptasia that I could find. Any ideas?

 

[Sugar Magnolia]

I have had this thing since I set up my 10gal tank. It is smaller than the diameter of a fingernail. It didn't match any Aiptasia that I could find. Any ideas?

It's a protopalythoa. A harmless button polyp.

 

[Fishyoga]

Thanks Sugar! Any idea how big these things can get?
It's cool just to watch him sometimes

 

[Sugar Magnolia]

That's as big as it gets.

 

[Shanet]

Anyone seen one of these?

Anyone seen one of these?

A Goody or a Baddy?
Like some kind of Slug.

 

[Shanet]

Try 2

A Goody or a Baddy?
Like some kind of Slug.

 

[Shanet]

Try 3

A Goody or a Baddy?
Like some kind of Slug.

 

[alexander_ktn]

Looks like an Elysia species - harmless (macro-)algae eaters, partially photosynthetic due to the chloroplasts they "steal" from the algae.

A picture from above, or through a clear glass would help in narrowing the species/genus down btw...

 

[Shanet]

Here is the best my phone will do. Its a cute little bloke, glad its harmless.

 

[alexander_ktn]

I can't narrow it down with this image, but it's definitely an Elysia species, so the things said above apply.

 

[Shanet]

Thanks, It's back in the tank

 

[LadyDave]

Is this why my zoas are closed up? Caught it right on the tip of one of them! Not going back in the tank but if there are more (likely as my zoas don't look happy!) any ideas on how I can get rid???

 

[Reefer54]

It is a stomatella. Harmless grazer.

I have many stomatellas, but i have never seen a entirely black one. i have a black unconfirmed stomatella, no mottling of colors on shell or body....it is black.

can anyone confirm this is possible...