What is this

[Ozreefer2.0]

I found these in the shells I got from my lfs. I’m not sure if there are more in my fish tank. I found three. Should I be worried?

 

[olonmv]

https://reefkeeping.com/issues/2002-05/rs/index.php

 

[olonmv]

How to tell the difference between "good" and "bad" Isopods (CIROLANID VERSES SPHAEROMATID ISOPODS)

CIROLANID VERSES SPHAEROMATID ISOPODS. When you know what your looking for, telling the difference between a Cirolanid (bad) versus a Sphaeromatid (good) becomes a lot easier. It's all in the eyes..... The eyes of the Cirolanid are generally closer together and towards the front of the head...

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