Any decorative invert that you regret and would never keep again?

[Beta reefs.]

Any decorative invert that you regret that you would never keep again? In the seahorse tank.

 

[Gman83]

Not sure if this counts as decorative, but arrow crabs.

 

[Gman83]

Sorry, missed the part about in a sea horse tank, but I wouldn't put an arrow crab in with sea horses.

 

[smitten with ocean life]

sally light foot crab. mine got so huge i had to get rid of it. then the LFS wouldnt even give me credit for him because he was so big!