What the heck is this?

[searstj22]

I bought some coralline algae online and got a few strange looking hitchhikers… any clue as to what these are?

I hate to be that guy.. but palytoxin creeps me out with kids hands in the tank… so I’m double checking!

thanks!
TJ

 

[blaxsun]

It's not palytoxin.

 

[searstj22]

Any idea what they are? Should I remove or just keep it?

 

[DeniseAndy]

Those two things on the disk look like my kids smooshed fruit snacks. Any better pictures of them?

 

[searstj22]

Those two things on the disk look like my kids smooshed fruit snacks. Any better pictures of them?

Added a few more… your description is about as good as it gets I think…

 

[Dburr1014]

Black sponge and not sure, looks like another sponge

 

[Sleeping Giant]

Looks like sponges

 

[DeniseAndy]

Sponges. Up to you whether you keep them or not.

 

[bnord]

the black is clearly a sponge, i have had them before and are not in my experience prolific. The white looks too to be sponge.
Both do no harm to the tank or the kids…

 

[vetteguy53081]

B;ack sponge which has toxins and undesireable in tank.
Take frag out of tank and place in a container of tank water and scrape off. Do not remove within tank

 

[Dburr1014]

B;ack sponge which has toxins and undesireable in tank.
Take frag out of tank and place in a container of tank water and scrape off. Do not remove within tank

I have never heard this.
Do you have some document to back this up?