Can someone ID these

[tankaholic]

Found these in the tank tonight after the lights were off for a few hours.
Anyone know what they are?
Good for tank? Bad for tank?
How do we get rid of them?

Thanks in advance

 

[tankaholic]

 

[tankaholic]

 

[greenhorn reefer]

Found these in the tank tonight after the lights were off for a few hours.
Anyone know what they are?
Good for tank? Bad for tank?
How do we get rid of them?

Thanks in advance

@Lionfish Lair

 

[greenhorn reefer]

To me, they look like some kind of nudibranch.

 

[Lionfish Lair]

It's probably little Elysia

 

[Lionfish Lair]

The first picture hadn't loaded for me and I'm just seeing it now. OMG! That's a beautiful picture. He's totally flayed out. Awesome.

They eat Caulerpa, BTW and do seem to be lacking food by their color. They should be green.

 

[tankaholic]

I was thinking zoa eating nudibranch...are they good or bad for tank?

 

[saltyfilmfolks]

I was thinking zoa eating nudibranch...are they good or bad for tank?

nope. those are fuzzy

They eat Caulerpa,

It depends on if you like calurpa

 

[tankaholic]

Isn't calupera a macro algea?
Will it eat any macro algea that I have in refugium? I currently have HOB filters on the tank but will be switching over to a overflow box and refugium in these next few days. I have ordered some macro algea should ship Thurs with a Friday delivery. I think it's called red dragons breath...it's the red algea along with cheato.
I have mushrooms, zoas, hammers, candy canes, chalice, some pavonas, and some favors.
Oh and 1 mini max.
Will those eat any of my corals?

 

[Lionfish Lair]

No, it won't touch your corals. I don't think it eats other algae, but let me check, so i could be wrong on that point. It's dying, so I guess it goes to reason that you have none of what it needs.

 

[tankaholic]

So their not harmful to the tank?
Now I do have a bryopsis out break in tank will eat that? Lol

 

[tankaholic]

Will they eat seaweed or algea pellets

 

[Lionfish Lair]

And I was wrong. They also eat Vaucheria litorea, which is a filamentous algae similar to cheato. That doesn't necessarily mean it eats cheato, though. If you haven't added anything it could still be a caulpera feeder that hitched in. They can live a long long time without the proper food due to the ability to unfold like that first picture and use photosynthesis. The fact they are loosing their green color says they are not getting enough to replenish its stores.

 

[tankaholic]

We plucked about 4-6 of them out of tank and boyfriend stuck them in a container and was gonna take to lfs and ask them what the heck they were....hehehe

 

[Lionfish Lair]

Will they eat seaweed or algea pellets

So their not harmful to the tank?
Now I do have a bryopsis out break in tank will eat that? Lol

I don't know exactly will they will take. I'm going to keep a list of what I run across. They absolutely won't hurt your tank. I would put them in my tank in a hot second.

 

[Lionfish Lair]

They really have a specific look, so you don't have to worry about mis-ID.

 

[Lionfish Lair]

Oh snap, you're saying you don't have any algae yet.... then it's definitely starving (unless it eats byropsis). Remember there's one species that does eat bryopsis and that's the Lettuce nudi.

So let's see...

Elysia rufescens eats bryopsis
Elysia crispata eats bryopsis
Elysia chlorotica eats a filimentous algae like bryopsis (Vaucheria litorea)
Elysia marginata eats bryopsis

Hmmmmm......

 

[Lionfish Lair]

Well, I was indeed totally wrong. They are definitely not obligate caulerpa predators. It's not all bryopsis and the different species seem to eat a lot of different algaes. Your cheato may be at risk, but it's cheato.... these critters are way cooler. There seems to be no red algaes in it's nom nom repertoire.

 

[acanfor420]

Could these be babies from lettuce nudi? I put 4 in that tank...
Oh by the way tankaholic is my gf...lol