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Delle meduse d’acqua dolce sono state scoperte nel laghetto balneabile di Trimmis. Si tratta della specie Craspedacusta sowerbii e non rappresenta alcun pericolo per i bagnanti, in quando non sono velenose, fa sapere il Canton Grigioni sul suo canale WhatsApp.
Uno di questi animali è stato osservato e filmato a metà settembre. Il video diffuso dal Cantone mostra la medusa, grande non più di 2,5 centimetri, mentre nuota.
Questa specie vive in acque ferme o a lento scorrimento dove l’acqua si riscalda e la sua presenza non ha nessuna correlazione con una scarsa qualità dell’acqua. L’animale si nutre di piccoli crostacei, rotiferi e protozoi ed è l’unica specie di Craspedacusta presente in acqua dolce che si è diffusa oltre l’Asia orientale.
Meduse
RSI Info 05.08.2025, 17:45
Contenuto audio
Nel lago cozze e meduse
Il Quotidiano 14.08.2018, 21:30
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https://whatsapp.com/channel/0029Vat6p4zL2ATyO8IRFJ2C
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