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Unknown pest?


Sorry for the poor picture. Does anyone know what this is?

It’s appeared today not seen it before. Looks like half a sea urchin but isn’t. Haven’t added anything to the tank for months so no new chances of introducing anything.

It’s black bodied with black/pink spines. Doesn’t move.

Any ideas would be appreciated.


Thanks Phil. Don’t think its a Nudi although it does look like it from the picture. I’m thinking it is an Urchin. [emoji51]