do urchins molt?

[fditty]

do urchins molt? i have an urchin that is spewing out some string like stuff. anyone know what that is?

 

[lharm]

Too MUCH hair algae?

 

[fditty]

how do i get rid of hair algae?

 

[wbilton]

Does anybody know what that is? I have the same problem and there is no hair algae.