ID help and please enlgihten me 2

[aljndrno]

more pictures.

many thanks.

 

[MartinE]

The sea Apples I would put in a tank by themselves, or back in the ocean.
The Nudibranch I would put back in the ocean.
White things dont know what they are.

 

[aljndrno]

Hmmm. Why? Are sea apples toxic to others in the tank?

The next pictures are nudibranch? I never saw one like these before.

The white sack came with live rock.

These nudis were given to me and don't know anything about them.

Many thanks.

 

[MartinE]

Well yes sea apples can be toxic when and if they die.
Nudibranch are specialized eaters and finding their food, or enough can be hard also some types are toxic when and if they die. So I personally would not have either in my tanks, because of the problems their husbandry could pose.

 

[Anonymous]

the white things look like they may possibly be tunicates which are not harmful but its hard to id

 

[aljndrno]

I have heard of tunicates before but don't know much about them. I also remember seeing a picture of one but can't remember if these look like the ones I saw.

I will research on them. Many thanks.