egg wrack

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egg wrack (knotted wrack) The common name for the brown seaweed Ascophyllum nodosum. The thallus is flattened and strap-like, branching, with no midrib; there are large, single air bladders. It is found in the middle part of sheltered rocky shores, often in great abundance. It may also be found in saltwater lochs.

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egg wrack

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