Blue Knuckle Hermit Crabs Known For Eatting Aiptasia ?

[zeo]

Hi,

I recently ordered a few shrimps and crabs for my tank. Which arrived today.
It was mainly to try and solve my aiptasia problem.

I found the peppermint shrimps quickly hiding in my LR (to be expected as I heard they only really come out at night).

But weirdly enough I found one of my blue knuckle hermit crabs munching up a small aiptasia which was stuck on the side inlet grail of one of my powerheads.
Are they known to do this?

Also I have no idea how the heck it got 1 1/2 foot up onto the powerhead, but are my crabs shrimps able to escape the tank. I have a couple of gaps where the wires/pipes go into the tank. Maybe better if I cover these over??

 

[BigIan]

I`ve not herd of them escaping as i`m pretty sure they are 100% aquatic.

and as for the aptasia munching crap consider it a bonus

 

[@ombomb]

my blue knuckle is a real mountaineer, always trying to climb up into the overflow, never made it out though

never seen it go for an aptasia

 

[Lynden]

Dardanus hermit crabs are one of aiptasia's nemeses. It comes as no surprise to me that other medium-sized hermit crabs eat them as well.