Can someone identify this for me

[Respect the Reef]

Can someone help identify this for me please, randomly showed up in my tank

 

[Respect the Reef]

Kind of a bad pic but it looks like a baby Yellow Sea slug but I never bought one, also kind of want to remove it from hearing how toxic than can be when harmed or die

 

[Respect the Reef]

Better picture of it

 

[Respect the Reef]

Looks like an alien lol

 

[Respect the Reef]

Better picture of it

I think I may have a coral eating nudi but if anyone could confirm this that would be great thanks!

 

[BonnieB]

Better picture of it

I think I may have a coral eating nudi but if anyone could confirm this that would be great thanks!

It looks like a monti eating nudibranch, or zoa eating one. What frag plug did it come off of?

 

[Respect the Reef]

It came off the rock work but I saw another one under a zoa frag, there’s like 3 of them havnt seen them before today, bought a cleaner shrimp and dwarf angel a week ago, but havnt seen them before i added them to the tank

 

[dvgyfresh]

Definitely looks like an alien but maybe a sea cucumber?

 

[bluemon]

Definitely a sea cucumber.

You can see its tube feet so it’s an echinoderm

 

[Respect the Reef]

Definitely a sea cucumber.

You can see its tube feet so it’s an echinoderm

Any idea how they would get in my tank there’s like 4 of them also will a wrasse eat those

 

[Gumbies R Us]

Did you buy live rock or any coral recently?

 

[Respect the Reef]

Did you buy live rock or any coral recently?

Nope haha that’s why I’m confused only thing I can think of is when I fed live brine shrimp I may have caught an egg in the net maybe??

 

[Respect the Reef]

Did you buy live rock or any coral recently?

Only bought a cleaner shrimp and a dwarf angel a week ago

 

[ISpeakForTheSeas]

Any idea how they would get in my tank there’s like 4 of them also will a wrasse eat those

I'm late, but definitely a sea cucumber; I would not expect any fish typically kept in our tanks to bother these at all, as sea cucumbers release an ichthyotoxin (fish-killing poison) called holothurin when stressed (and it's in their body parts). So, fish tend to avoid them.

As long as they don't get harassed or chopped by a powerhead or something, they should generally be safe. I have a bunch of posts on feeding them if you want to keep them; if you don't want them, I would see if you can give them to a local hobbyist, fish store, etc.