Guided snorkel trips off Portsea on the Mornington Peninsula head out over the seagrass and reef of Port Phillip Bay in search of weedy seadragons, with an in-water guide and a skills briefing for newcomers. The award-winning operator also runs beginner scuba experiences and PADI courses, sea-kayak and paddleboard tours, guided walks and marine-education programs for schools, plus its own group accommodation in Portsea. Trips run year-round, including through the colder months when the bay's marine life is at its most active.