Map showing how japweed has spread through Europe. The year in brackets denotes when the first drifting examples were observed, while the year without brackets denotes when the first attached example was observed. Yellow areas denote continuous populations.

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© Aquascope 2000   Tjärnö Marine Biological Laboratory, Strömstad, Sweden
Bo Johannesson | Martin Larsvik | Lars-Ove Loo | Helena Samuelsson