rock bait/ Bi Valves

animalia

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What implication/effect would a bi-valve (commonly known as Rock bait on the Natal Coast) have on a marine tank/sump?
 

animalia

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not very easy to describe - these are usually dark brown rock looking growths. they grow on the rocks. they have on each side a horn - holes in the horns - if you touch it, it contracts and squirts water out of the holes - fisherman usually cut them open and take out a red orange meaty substance which they refer to as rock bait. these 'bi valves usually are all over and if you remove other items from the rock these organisms are stuck to the rocks and squirt this water out. unfortunately no pics
 

Warr7207

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They are ok in tanks, but generally don't survive, similar survival rate to mussels and oysters.

They need loads of super fine Zoo & Phytoplankton to survive.
 

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