Can someone help me ID This?

[LE0]

can anyone identify these? checked my tank at 3am saw these for the first time in the tank.
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[Supurderek]

I was wrong! Nudibranch it is!

 

[LE0]

Looks like a polyclad flatworm of some type. Not good, generally speaking. Maybe try and get another top down with it flattened out.

possible algae eaters? since its the closet thing i can find online but not sure. I don't think it will hurt the corals in my system since I'm only keeping SPS and chalices with 3 scolys in a bare bottom system. Also, everything grows well no sign of stress or anything. I spotted them on the back of the glass since my rocks barely have any algae at all.

 

[reef lover]

Looks like a lettuce nudibranch....algae eater s.

 

[LE0]

Looks like a lettuce nudibranch....algae eater s.

I added better pictures & I have the same thought as algae eaters

 

[reef lover]

Areed...safe

 

[Sm51498]

These are definitely nudibranchs.

Maybe they are algae eaters but maybe not. Mostly it is hard to keep nudibranchs alive, they are usually super specialized and you may not have food for them.

 

[Lionfish Lair]

These guys are wonderful. Absolutely leave them be. It's an Elysia of some type and they definitely eat algae.... like bryopsis.

 

[WetWhistle]

It looks like a Elysia sp to me as well. Just to be safe keep them segregated and add some algae and see what happens if you are worried. Have you seen any unexplained damage to your corals? If not they are most likely safe.

 

[Lionfish Lair]

I rarely say this, but I'm 100% positive that's what they are. If I wasn't on vacation I'd offer to buy them from you, if you didn't want them. They are awesome, yet don't really live a long time. I would try to breed them, just because they are so cool.

 

[JP79]

Very much safe. They are a lot of fun to watch.