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[Myka]

Originally Posted by gobytron

I can attest to both my blue and my yellow never showing any aggression to each oother or any of the other conspecific basslets in my tank, so maybe I'm just lucky.

The yellow (about half the size of the blue) was added about a year before the blue one so strictly speaking from my experience you should have no issues at all adding a second assessor.

Cool, thanks goby! My Blue is also quite cryptic, and if I could catch it I would put it in my Zoa nano so I would see it more often, plus the strong blue lighting in there would make it look awesome. Assessors aren't very widely kept, so I think there is a lack of precise information. Since they are a basslet you would assume they theoretically shouldn't get along, but there always exceptions. You aren't the first person I have heard of keeping a Blue and a Yellow together, and I think Leah (on these forums) also keeps them together. I have also heard of people keeping harems of Blues long-term with no troubles. Time to go buy a Yellow I should say.