broken spines

[stkitts]

I have had a healthy long spined sea urchin for about 4 months. Recently, he has shrunk to about ½ his size (reduced spine length) in a couple of weeks. I have been away and noticed this change on my return. I wonder if he is sick or has broken his spines because he wedged himself into a tight spot. I have other invertebrates that are healthy and all my fish and water parameters are excellent. I have posted this in the “new to the hobby” area and realize that this is where I should have gone for information and advice.

 

[greenbean36191]

I suspect your trigger may have something to do with this.

 

[stkitts]

Now I have a whole bunch of questions. Will the spines grow back and will he be healthy? Should I separate the urchin from the trigger? If so that means that I will find a new home for the urchin as he likes to redecorate my tank.

 

[greenbean36191]

Assuming the spines don't become infected, the urchin should be able to recover and regrow them. I don't think relations between the fish and urchin are going to get any better though.

 

[stkitts]

Thanks for the information. I know a good home for him when he comes out from hiding.