What is this

[Brewerjkurt]

Found this in my tank and have no idea what it is.

 

[flsalty]

Sea slug but I can't tell the species. Possibly a nudibranch.

 

[Brewerjkurt]

Is it bad for my corals? Should I take it out?

 

[flsalty]

Is it bad for my corals? Should I take it out?

There is no way of knowing that without a positive ID.

 

[AcroNem]

It does look like a Nudibranch, (sea slug=no exposed gills, Nudibranchs have exposed gills) I also thought cucumber though. More likely the former. I also have no idea on species. If it's a Nudibranch they have highly specialized diets and unfortunately almost all of them are nearly impossible to feed in captivity.

 

[Reefer Reboot]

Try looking up Bushy-Backed Nudibranch (Dendronotus frondosus) to see if it might match. Many different versions. Any idea where geographically it might have come from?

 

[Brewerjkurt]

Thanks that looks like it. I have no idea where it came from.

 

[flsalty]

It does look like a Nudibranch, (sea slug=no exposed gills, Nudibranchs have exposed gills) I also thought cucumber though. More likely the former. I also have no idea on species. If it's a Nudibranch they have highly specialized diets and unfortunately almost all of them are nearly impossible to feed in captivity.

In the interest of passing on correct information:

All sea slugs have exposed gills. Not all sea slugs have branching gills. All nudibranchs are sea slugs. Not all sea slugs are nudibranchs.

 

[Backreefing]

What ever it is , if you don’t know what it is , take it out .
If it was me and I left it in , there would be hundreds of them, with stressing corals ( my luck)
But in general these things tend to look like what they eat .