Caution for clams
You might have heard about the invasive Freshwater Gold Clam (Corbicula) being found in a stretch of the Waikato River and also in an isolated lagoon near Taupō last year. They usually live in freshwater - as in lakes and rivers - but they can survive in brackish water at up to half the saltiness of seawater.
So if you go between a lake or river, and a place where fresh and saltwater mixes - like an estuary, please make sure you follow the Check Clean Dry rules for your boat and gear every time. This will help prevent spread and protect what we love.