Sea urchin

[ashnic29]

So I have a white pincushion sea urchin. He has now started become red where his mouth is. Almost like a blood red. He was not this way before. I’m not sure what is going on. He has moved very little today also

 

[Uncle99]

What are current water conditions in terms of parameters?
How long has it been in the tank?
How long has this tank been running?
Are you dosing anything?

 

[ashnic29]

Tank has been running for 6 months, he’s been in there for a couple months. Water conditions are fine. Within normal parameters. I just checked on him. And he literally exploded. I just had to clean him out of the tank.

 

[fishguy242]

sorry to hear,change out your carbon,add new change again in 48 hrs

 

[ashnic29]

Okay. Thank you

 

[College Fishkeeper]

I haven't dealt with that specific species of urchin, but I used to work in an aquarium and when we had Strongylocentrotus purpuratus aka pacific purple sea urchin, when they lost color like that in their test, it would be a sign that they were dying. I can't say why it looks like that but just my two cents.