ID help ostreopsis?

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Can someone help me ID this? This is from a brown string i have on all my glass, sand and rocks
 

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IF EVERY OPTION HELD ROUGHLY THE SAME NUMBER OF GALLONS, WHICH TANK SHAPE WOULD YOU CHOOSE?

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    Votes: 10 23.3%

  • Long and shallow

    Votes: 8 18.6%

  • Cube

    Votes: 4 9.3%

  • Peninsula

    Votes: 9 20.9%

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  • Tall display

    Votes: 0 0.0%

  • Dropoff

    Votes: 1 2.3%

  • Bowfront

    Votes: 1 2.3%

  • Hexagon

    Votes: 0 0.0%

  • Cylinder

    Votes: 0 0.0%

  • Fishbowl

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  • Something else (describe it in the comments)

    Votes: 1 2.3%
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