Found in my sump

Rusty Dalton

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Can someone please tell me what these critters are?

IMG_0342.JPG
 

Flippers4pups

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Can someone please tell me what these critters are?

IMG_0342.JPG

Large white ones? do they move?

Hard to tell from the picture. Kind of look like pineapple sponges or a nudibranch.
 

Flippers4pups

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Most are about the size of a grain of rice, and do not swim. attached to the glass and pump.

Pineapple sponges then. Harmless filter feeders.
 

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