I'm not sure what the proper word for the "hole" they have inside them is, but it looks like it has something comming out of it or stuck in it... kinda fleshy looking.
Walter
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*30g+- (24x16x18)
*Seio 620 + MJ1200
*EuroReef 5-2
*Ebo - 100w Heater
*250w PFO HQI w/XM20k
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